Here's the revised YouTube video description without the links: Learn how to use the double angle identities to solve ...

Practise solving trigonometric equations in degrees or radians using CAST and its period to find other solutions within the range, including multiple or compound angles and the wave function.

Learn how to solve for unknown angles in right triangles using inverse trigonometric functions! This step-by-step trigonometry lesson covers labeling triangle sides, using sine and cosine ratios, ...