Main content

## Class 10 (Old)

### Course: Class 10 (Old) > Unit 8

Lesson 5: Trigonometric identities- Intro to Pythagorean trigonometric identities
- Converting between trigonometric ratios example: write all ratios in terms of sine
- Evaluating expressions using basic trigonometric identities
- Trigonometric identity example proof involving sec, sin, and cos
- Trigonometric identity example proof involving sin, cos, and tan
- Trigonometric identity example proof involving all the six ratios
- Trigonometric identities challenge problems

© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

# Trigonometric identities challenge problems

## Problem

Stuck?

Stuck?