Math, asked by alexandar9750, 8 months ago

cos 3a is equal to
(A) 3cosa - 4cosa
(C) 4cos'a - 3cosa
(B) 3cos'a + 4cosa
(D) 4cosºa + 4cosa

Answers

Answered by SASITN

2

Answer:

COS3A = 4COS^3 A - 3 COSA. .I think the option is wrong .

Step-by-step explanation:

please refer to the attachment for step by step explanation

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