Lecture

Basic Trigonometry Part 1

This module serves as an introduction to the core trigonometric functions: sine, cosine, and tangent. These functions are fundamental in understanding the relationships within right triangles. Students will learn:

  • The definitions of sine, cosine, and tangent
  • How to apply these functions to solve problems involving right triangles
  • Basic examples to illustrate their use

By mastering these concepts, learners will build a solid foundation for more advanced trigonometric applications.


Course Lectures
  • This module serves as an introduction to the core trigonometric functions: sine, cosine, and tangent. These functions are fundamental in understanding the relationships within right triangles. Students will learn:

    • The definitions of sine, cosine, and tangent
    • How to apply these functions to solve problems involving right triangles
    • Basic examples to illustrate their use

    By mastering these concepts, learners will build a solid foundation for more advanced trigonometric applications.

  • This module provides further exploration into the sine, cosine, and tangent functions, focusing specifically on right triangles. In this section, students will:

    • Work through practical examples to calculate these trigonometric ratios
    • Understand how these functions apply to various angles
    • Engage in problem-solving exercises to solidify their knowledge

    Completing this module will enhance confidence in using trigonometric functions for real-world applications.

  • Radians and Degrees
    Salman Khan

    This module focuses on the fundamental difference between radians and degrees, two essential units for measuring angles. Students will learn:

    • The definition of a radian and how it relates to circles
    • How to convert between radians and degrees
    • Practical applications of both units in trigonometry

    Through engaging examples and exercises, learners will be able to navigate between these two measurement systems with ease.

  • This module introduces the application of trigonometric functions in solving for the sides of a right triangle. Key topics include:

    • Using sine, cosine, and tangent to find unknown sides
    • Step-by-step examples demonstrating the process
    • Tips for avoiding common mistakes

    By the end of this module, students will have the tools necessary to confidently solve right triangle problems using trigonometric functions.

  • This module continues the exploration of trigonometric functions by providing additional examples for solving triangle sides. The focus will be on:

    • Applying sine, cosine, and tangent to various problems
    • Practice exercises to reinforce understanding
    • Exploring different scenarios and their solutions

    Students will gain further confidence and proficiency in using trigonometric functions through hands-on practice.

  • This module delves into the unit circle, a crucial concept for understanding trigonometric functions. It covers:

    • The definition of the unit circle and its significance
    • How the unit circle relates to sine, cosine, and tangent
    • Visual representations to aid comprehension

    By utilizing the unit circle, students will extend their knowledge of basic trigonometric functions and their applications.

  • This module continues the exploration of the unit circle, further defining the sine, cosine, and tangent functions. Key points include:

    • Detailed explanations of each function as it relates to the unit circle
    • Graphical representations to illustrate concepts
    • Real-world applications of these functions

    Students will solidify their understanding of trigonometric functions through visual learning and practical examples.

  • In this module, students will learn to graph the sine function using the unit circle definition. Topics include:

    • The relationship between the unit circle and the sine graph
    • Step-by-step graphing techniques
    • Understanding the characteristics of the sine function

    By visualizing the sine function, learners will enhance their comprehension of trigonometric concepts and their applications.

  • This module provides an in-depth exploration of the graphs of trigonometric functions. Key topics include:

    • How to draw and interpret the graphs for sine, cosine, and tangent
    • Understanding the periodic nature of these functions
    • Applications of trig graphs in real-world scenarios

    Students will practice graphing and analyzing functions, which is essential for higher-level math courses.

  • This module focuses on the analysis of sine and cosine functions, particularly their amplitude and periods. Topics covered include:

    • Defining amplitude and period in mathematical terms
    • How to determine these characteristics from graphs
    • Examples illustrating how changes affect amplitude and period

    By understanding these concepts, students will gain better insight into the behavior of trigonometric functions.

  • Trig Graphs
    Salman Khan

    This module guides students in determining the equations of trigonometric functions by inspecting their graphs. Key learning points include:

    • Identifying key features of graphs to formulate equations
    • Working through examples and practice problems
    • Tips for avoiding common pitfalls in graph analysis

    Mastering this skill is crucial for translating graphical information into algebraic expressions.

  • This module focuses on determining the amplitude and period of sine and cosine functions. Students will explore:

    • How to identify amplitude and period from equations
    • Practical exercises to reinforce these concepts
    • Real-world applications of amplitude and period

    Understanding these characteristics is vital for comprehending the behavior of trigonometric functions.

  • This module introduces students to the concept of trigonometric identities. Key topics include:

    • The significance of identities in trigonometry
    • Common trigonometric identities and their applications
    • Basic examples demonstrating identity proofs

    By understanding these identities, students will be better equipped to solve more complex trigonometric equations.

  • This module provides a detailed proof of the trigonometric identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b). Students will learn:

    • The steps involved in proving this identity
    • Applications of the identity in solving problems
    • Visual aids to help understand the proof

    Mastering this identity is essential for progressing in trigonometric studies.

  • This module focuses on the proof of the identity cos(a+b) = (cos a)(cos b) - (sin a)(sin b). Key learning points include:

    • The step-by-step process of the proof
    • How this identity can be applied in various scenarios
    • Graphical illustrations to enhance understanding

    By mastering this proof, students will deepen their understanding of trigonometric relationships.

  • This module continues the exploration of trigonometric identities, focusing on more advanced identities and their applications. Key points include:

    • Introduction to additional identities
    • Examples proving these identities
    • Practical applications in solving trigonometric equations

    Students will build on their foundational knowledge and enhance their problem-solving skills in trigonometry.

  • This module continues with the exploration of trigonometric identities, providing further insight into their application. Students will learn:

    • More complex identities and how to prove them
    • Real-world scenarios where these identities are applicable
    • Practice problems to test understanding

    By the end of this module, students will be adept at utilizing various trigonometric identities in different contexts.

  • This module delves into trigonometry word problems, specifically focusing on the scenario of a ship captain going off track. Students will address:

    • The initial problem setup and its implications
    • Trigonometric methods to analyze the situation
    • How to approach complex word problems systematically

    By engaging with real-life scenarios, learners will develop practical problem-solving skills.

  • This module continues the exploration of the ship captain's navigation problem, addressing the second part of the scenario. Students will learn:

    • How to apply trigonometric concepts to find solutions
    • Step-by-step analysis of the problem
    • Techniques for addressing multi-part word problems

    By the conclusion of this module, students will be able to effectively solve comprehensive trigonometric problems.

  • Law of Cosines
    Salman Khan

    This module provides an introduction to the law of cosines, a vital tool for solving triangles when two sides and an angle are known. Topics covered include:

    • Understanding the law of cosines and its derivation
    • Examples illustrating its application in problem-solving
    • Real-world scenarios where the law is applicable

    Mastering this law will enhance students' ability to tackle a wider range of trigonometric problems.

  • This module explores a fascinating real-world application of trigonometry through a navigation problem involving two ships. Students will learn how to apply trigonometric principles to solve complex navigation issues.

    Key points covered include:

    • The setup of the problem and initial conditions
    • Using angles and distances to determine positions
    • Strategies for avoiding collisions using trigonometric calculations
  • Proof: Law of Sines
    Salman Khan

    This module provides a clear and straightforward proof of the Law of Sines. Students will delve into the derivation of this essential trigonometric law, which relates the sides of a triangle to the sines of its angles.

    The learning objectives include:

    • Understanding the Law of Sines
    • Step-by-step breakdown of the proof
    • Applications of the Law of Sines in solving triangles
  • In this module, students will explore trigonometric problems related to the heights of two individuals on a Ferris wheel. This engaging scenario allows learners to visualize and apply trigonometric functions in a practical context.

    Focus areas include:

    • Modeling the Ferris wheel's motion with trigonometric functions
    • Calculating heights at different points
    • Understanding periodic functions through real-life examples
  • This module continues the exploration of Ferris wheel-related trigonometry, focusing on the graph of the function h(t) = 9 - 8cos(18t). Students will learn to interpret and analyze this function in the context of the Ferris wheel's motion.

    Key concepts include:

    • Graphing trigonometric functions
    • Understanding amplitude and period
    • Applying cosine functions to real-world scenarios
  • Fun Trig Problem
    Salman Khan

    This engaging module presents a fun trigonometry problem that incorporates the quadratic equation. Students will discover how trigonometric functions can be intertwined with algebraic concepts to solve unique challenges.

    Topics covered in this module include:

    • Setting up the problem using trigonometry
    • Applying the quadratic equation to find solutions
    • Exploring the intersection of algebra and trigonometry
  • This module introduces students to the inverse trigonometric function arcsin. Learners will understand how this function helps in finding angles when given the sine value.

    Key learning points include:

    • Definition and properties of arcsin
    • Applications of arcsin in solving triangles
    • Graphing the arcsin function and understanding its range
  • In this module, students will explore the arctan or inverse tangent function. This function is crucial for finding angles when the tangent value is known.

    The module covers:

    • Understanding the definition and characteristics of arctan
    • Applications of arctan in practical problems
    • Graphing the arctan function and analyzing its behavior
  • This module focuses on the inverse cosine function, also known as arccos. Students will learn how to determine angles from cosine values using this function.

    Key areas of focus include:

    • Definition and properties of arccos
    • Applications of arccos in solving triangles
    • Graphing the arccos function and understanding its range and behavior
  • This module revisits the proofs of essential trigonometric identities. Students will engage with various identities and understand their significance and applications in solving problems.

    Topics include:

    • Common trigonometric identities and their proofs
    • How to apply these identities in problem-solving
    • Exploring the relationships between different identities