Main content
Course: Algebra 2 (Eureka Math/EngageNY) > Unit 2
Lesson 7: Topic B: Lessons 15-17: Trigonometric identities- Proof of the Pythagorean trig identity
- Using the Pythagorean trig identity
- Use the Pythagorean identity
- Trig angle addition identities
- Using the cosine angle addition identity
- Using the cosine double-angle identity
- Using the trig angle addition identities
- Proof of the sine angle addition identity
- Proof of the cosine angle addition identity
© 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice
Use the Pythagorean identity
You might need: Calculator