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Principal solutions of the equation ` sin 2x + cos 2x =0` . Where `pi lt x lt 2pi ` are

A

`7(pi)/(8),11(pi)/(8)`

B

`9(pi)/(8),13(pi)/(8)`

C

`11(pi)/(8),15(pi)/(8)`

D

`15 (pi)/(8),19(pi)/(8)`

Text Solution

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The correct Answer is:
C
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