Question

solve 2cos3theeta =1
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Answer 1

Answer:

Don't know whether it is correct or not

Step-by-step explanation:

Answer 2

Answer:

Hope it will help u

:)

Let theeta =A

Then, 2cos3A=1

=> cos3A=1/2

=> cos3A=cos60°

=> 3A=60°

=>A=20°

Hence, theeta=20°