If `y = (1 + Sinx )/ cosx` , find the value at `x = pi/4`

If sinx+cosx=1/5 , then find the value of tan 2x .

If sinx-cosx=0 then find the principal value of x

If 8sinx- 4 = cos.x, the values of sinx are

If 3sinx+4cosx=2 , then find the value of 3cosx-4sinx .

The area of the region between the curves y= sqrt((1+sinx)/(cosx))and y = sqrt((1-sinx)/(cosx)) bounded by the lines x = 0 and x = pi/4 is

If y=(sinx)/(x+cosx) , then find (dy)/(dx) .

If y=log(sinx-cosx) , then (dy)/(dx) at x=(pi)/(2) is :

tan^(-1) ((cosx - sinx)/(cosx + sinx)) , 0< x < pi

If sinx+cosx=sqrt(y+1/y), y gt 0, x in[0,pi] , then find the least value of x satisfying the given conditions.