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
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
0
Answer:
A=20°
Refer the attachment for step by step explanation.
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