if `y=acosx+bsinx , y=7sqrt(2),(d y)/(d x)=sqrt(2)` when `x=pi/4` then find `a&b`

If y=sin^(-1)[(acosx+bsinx)/(sqrt(a^(2)+b^(2)))]," then "(dy)/(dx)=

If x and y are rational and if x (3 + 2 sqrt2) - y sqrt2 = y(5 -3 sqrt2) + 7(2 + x sqrt2) , then find the value of x and y

If : a = tan x, b = tan y , c=sqrt(1+a^(2)),d= sqrt(1+b^(2)), "then" : cd * sin (x+y)= A) a-b B) a+b C) c-d D) c+d

If sqrt(x+1)+sqrt(y)+sqrt(z-4)=(x+y+z)/(2), then find x+y+z

If sqrt(x+y)+sqrt(y-x)=c , then (d^2y)/(dx^2) =

If sqrt(x)+sqrt(y) = sqrt(a) , find (d^(2)y)/(dx^(2)) at x = a.

sqrt(x+y)+sqrt(y-x)=c,then(d^(2)y)/(dx^(2)) equals

If (dy)/(dx) +y sec x=tan x," then (sqrt(2) +1) y((pi)/(4)) - y(0)=, (A) sqrt(2) - (pi)/(4) (B) sqrt(2) + (pi)/(4) (C) sqrt(2) - (pi)/(2) (D) sqrt(2) + (pi)/(2)