Question

cos^2 30° - sin^2 30°
A) cos30°
B) sin60°
C) cos60°
D) sin45°​

Answer 1

Answer:

c) cos60°

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Answer 2

Answer:C

Step-by-step explanation:

cos 30=√3/2

sin 30=1/2

cos²30-sin²30

(√3/2)²-(1/2)²

3/4-1/4

1/2=cos 60

Hope this helps