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sqrt(cos 2x) + sqrt(1 + sin 2x) = 2sqrt(...

`sqrt(cos 2x) + sqrt(1 + sin 2x) = 2sqrt(sin x + cos x)` if

A

sin x + cos x = 0

B

`x = 2npi, n in I`

C

`x = npi - pi/4 , n in I`

D

`x = 2npi +- cos^-1 (-1/5), n in I`

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PATHFINDER-TRIGONOMETRIC EQUATION AND INVERSE-QUESTION BANK
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