- #1
Enochfoul
- 54
- 2
Homework Statement
Hi Everyone, Would somebody please be able able to check my working for the following problems:
(Q1) Prove the identity of cos3θ - cos7θ/sin 7θ + sin3θ ≡ tan 2θ
(Q2) Prove the identity of cos3θ ≡ 4 cos^3θ - 3 cos θ [hint: Express cos 3θ as cos (2θ+θ).]
Homework Equations
The Attempt at a Solution
Scanned working attached