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Which of the following are equivalent to the function y = 4cos x - 2? Check all that apply.

Ay = -4cos x + 2
By = 4sin(x +π/2 ) - 2
Cy = 4sin(x - π/2) - 2
Dy = 4cos(-x) - 2 ...?

Verified Answer :

Nirina7

the answer is 
D. y = 4cos(-x) - 2
proof
cosine is an even function, it means cos(-x) = cosx
so y = 4cos(-x) - 2 = y = 4cos(x) - 2

Answer:

According to Apex, the answer is B and D.

Step-by-step explanation:

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