Math, asked by apotdukhe3, 11 months ago

If 2 cos 3A is equal to 1 then the value of A is
a) 40° b) 60° c) 80° d) 20°

Answers

Answered by adivishnu1
4

Answer:

20°

Step-by-step explanation:

2Cos3A = 1

Cos 3A = 1/2

Cos 3A = Cos 60°

therefore, 3A = 60°

A= 60/3 = 20°

Answered by GigglyPuff7777
0

Answer:

A=20°

Refer the attachment for step by step explanation.

Attachments:
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