Trigonometry

For a complete depth review, I encourage you to read a precalculus book Here are relevant sections for a free online book from OpenStax

• Introduction to Trigonometric Functions
• Graphs and Inverses of Trigonometric Functions
• Trigonometric Identities

Below are a curated selection of videos to help catch you up as quickly as possible.

To see a larger video, click on the button in the bottom corner of the video player. A PDF copy of the notes is linked in the title where available. It may also help to follow along with this two page formula sheet or Dr Oussa's Quick Review of Trigonometry.

Precalculus

Basic Trigonometry

• Introducing Sine, Cosine, and the Unit Circle.

• Computing Sine and Cosine for Special Angles between $0$ and $2\pi$.

• Computing Sine and Cosine for Any Special Angle.

• The Tangent Function.

Solving Equations and Inverse Functions

• Solving Simple Equations.

• The Inverse Cosine Fucntion

• The Inverse Sine Function
  Click here for Video

Trigonometric Identities

• Essential Trigonometric Identities

• Using Trigonometric Identities

• Proofs of Trigonometric Identities

  • Example 1
  • Example 2
  • Example 3
  • Example 4
  • Example 5

Calculus

Trigonometric Integrals

• Basic Integrals of Trig Functions