Trigonometric Identities and Equations

Formula for the cosine and the difference of two angles

Sum and Difference Formulas

Cosine of Difference

Sum and Difference Identities for Sine and Cosine

How to use the Cosine Sum and Difference Identities to Find Exact Values

Identities for Sum and Differences of Sine and Cosine, Example 3

Sum and Difference Identities for Sine and Cosine, More Examples #1

Tangent Sum & Difference Identities

Cosine of the Difference of Two Angles

Sum and Difference Identities for Tangent

Using the difference of two angles to evaluate the an angle for cosine, cos195

Using the Sum and Difference Identities for Sine, Cosine and Tangent, Ex 1

Sum and Difference Identities for Sine and Cosine, More Examples #3

Using the Sum and Difference Identities for Sine, Cosine and Tangent, Ex 2

Using Tangent Sum and Difference Identities to Find an Exact Value

Write sum and difference formula for tangent as one trig function

Sum and Difference Identities for Sine and Cosine, More Examples #2

Using The Sum and Difference Identity to Determine a Sine Function Value

How to evaluate the difference of two angles for cosine function

Using the Sum and Difference Identities for Sine, Cosine and Tangent, Ex 3

Tangent Sum and Difference Formulas How to Use

This course covers topics including trigonometric functions (with graphs and inverse functions), identities and equations, solutions of triangles, complex numbers and more.

College Trigonometry

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Math Stuff

Professor Cornell

Stephanie Yurasits

Mathispower4u

Mario's Math Tutoring

Steve Stein

Brian McLogan

Math and Stats Help

patrickJMT

Angles and the Trigonometric Functions

Trigonometric Functions graphs, Inverse Trigonometric Functions

Laws of Sines, Cosines and Vectors

Complex Numbers, Polar Coordinates and Parametric Equations

Product-to-Sum Formulas

Sum-to-Product Formulas

Product-to-Sum and Sum-to-Product Formulas

Double-Angle Formulas

Power-Reducing Formulas

Use the Half-Angle Formulas

Double-Angle, Power-Reducing, and Half-Angle Formulas

Sum and Difference Formulas for Cosines and Sines

Sum and Difference Formulas for Tangents

Fundamental Trigonometric Identities to Verify Identities

Expressions containing both logarithmic and trigonometric functions

Verifying Trigonometric Identities

Find All Solutions of a Trigonometric Equation

Solve Equations with Multiple Angles

Solve Trigonometric Equations Quadratic in Form

Factoring to Separate Different Functions in Trigonometric Equations

Identities to Solve Trigonometric Equations

Calculator to Solve Trigonometric Equations

Solve equations with trigonometric and exponential or logarithmic functions

Trigonometric Equations

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

Physics

Patrick

General Biology

Jason

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

Anatomy & Physiology

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities

Writing Emails People Want To Read

Critical Thinking

Self Management

Digital Literacy

Collaboration

Communication

Analytical Thinking

Leadership

Flexibility/Adaptability

Innovation

Eric Zackrison

Nicole Tetreault

Dive deep into Python with videos and more.

Introduction to Python

Arianne Dee

Agile Project and Product Management

Agile & Product Management

Mariya Breyther 

Introduction to Microsoft Power BI

Microsoft Power BI

Chris Sorensen

Data Analysis Fundamentals with Excel

Data Analysis - Excel

Chris Sorensen & Ammul Shergill

Getting Started with  and Cryptocurrency

Introduction to Blockchain

George Levy

Learn Enough HTML, CSS and Layout to be Dangerous

HTML, CSS & Layout

Lee Donahoe & Michael Hartl

Learn Enough JavaScript to be Dangerous: A Tutorial Introduction to Programming with JavaScript