Question

A) Prove the trigonometric identity (tan x + 2)^2 = sec^2 x + 4 tan x...

A) Prove the trigonometric identity

(tan x + 2)^2 = sec^2 x + 4 tan x + 3

B) Use a sum-to-product identities to show that

cos(x + y) cos x cos y = 1 − tan x tan y.

C) Write the product as a sum

Sin12xSin4x

Math   Precalculus   
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