If `(dI)/(dy)=3^(cosy)*siny`, then I is equal to

If x sin(a+y) = siny then (dy)/(dx) is equal to

The value of the expression 1-sin^2y/(1+cosy)+(1+cosy)/siny-siny/(1-cosy) is equal to

Solve: sin^3x(dx)/(dy)=siny

If (sinx)/(siny)=(1)/(2),(cosx)/(cosy)=(3)/(2) , where x,y in (0,(pi)/(2)) , then the value of tan (x+y) is equal to

If cosy=xcos(a+y)" with "cosa!= +-1 , then dy/dx is equal to