Main content

## Precalculus

### Course: Precalculus > Unit 2

Lesson 10: Using trigonometric identities- Finding trig values using angle addition identities
- Using the tangent angle addition identity
- Find trig values using angle addition identities
- Using trig angle addition identities: finding side lengths
- Using trig angle addition identities: manipulating expressions
- Using trigonometric identities
- Trig identity reference
- Trigonometry: FAQ

© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

# Find trig values using angle addition identities

CCSS.Math: HSF.TF.C.9

## Problem

Stuck?

Stuck?