Question

Find the value of A(0°<A<90°) if 2cos2A = 1/2.



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Answer 1

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Answer 2

Answer:

90°or 45°

Step-by-step explanation:

2cosA=1/2

=cosA=1*2/2

=cosA=1

at 90° the value of cos is 1

so ans. is 90°

or

cos2A=1

at 90° the value of cos is 1

so 2*45 will be 90°

so A=45°