If cos 4 Alpha upon cos square theta + sin 4 Alpha upon sin square theta equal to 1 then - Maths - Introduction to Trigonometry

Question

If cos 4 Alpha upon cos square theta + sin 4 Alpha upon sin square
theta equal to 1 then prove that cos 4 theta upon cos square alpha
+ sin 4 theta upon sin square alpha equal to 1

Pushpa Devi · Accepted Answer

If cos 4 Alpha upon cos square theta + sin 4 Alpha upon sin square theta equal to 1 then prove that cos 4 theta upon cos square alpha + sin 4 theta upon sin square alpha equal to 1