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`int(sinx)/(sqrt(cos2x))dx=`

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in Indefinite Integral by (123k points)
`int(sinx)/(sqrt(cos2x))dx=`
A. `(-1)/(sqrt2)log[sqrt2 cos x+sqrt(cos2x)]+c`
B. `(-1)/(sqrt2)log[sqrt2 cos x+sqrt(2sin^(2)x-1)]+c`
C. `(-1)/(sqrt2)log[sqrt2 cos x+sqrt(1-2cos^(2)x)]+c`
D. `(-1)/(sqrt2)sec^(-1)(2cos^(2)x-1)+c`
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Correct Answer - A
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