Question

Answer to cos²75°-sin²15°=

Answer 1

Answer:

asdfghjk

Step-by-step explanation:

Answer 2

Answer:

cos^2( 45°+30°) - sin^2(45°-30°)

(1/√2+√3/2)^2 - ( 1/√2-1/2)^2

(2+√6/2√2)^2 - (2-√2/2√2)^2

10/8 - 2/8

8/8 = 1

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