int(dx)/(1+2sin x+cos x)" equals- "

The value of int(dx)/(2+sin x+cos x) equals

int (dx)/(sin^2 x cos^2 x) equals :

int (1)/(sin x cos x)dx is equal to

int(cos 2x)/(1+sin x cos x)dx

If int_(0)^((pi)/(2))(dx)/(1+sin x+cos x)=In2, then the value of int_(0)^((pi)/(2))(sin x)/(1+sin x+cos x)dx is equal to:

int (dx)/(cos x-sin x) is equal to :

int(dx)/( sin^(2)x cos^(2)x) is equal to

int(dx)/( sin^(2)x cos^(2)x) is equal to