If `xcosy+ycosx=pi` then the value of `y^(0)` is equal to `pi` (b) `-pi` (c) 1 (d) 0

If xsiny+ycosx=pi , then the value of y''(0) is :

If x cos y+y cos x=pi then the value of y'(0) is equal to pi(b)-pi(c)1(d)0

If y=f(x)" and "ycosx+cosy=pi , then the value of f''(0) is

If x in [0. (pi)/(2)], y in [0, (pi)/(2)] and sin x + cos y =2, then the value of x+y is equal to........ A) 2pi B) pi C) pi/4 D) pi/2

sin^(-1)(0) is equal to : (a) 0 (b) pi/6 (c) pi/2 (d) pi/3

The amplitude of (1)/(i) is equal to 0 b.(pi)/(2) c.-(pi)/(2) d.pi

The amplitude of 1/i is equal to 0 b. pi/2 c. -pi/2 d. pi

The amplitude of 1/i is equal to a. 0 b. pi/2 c. -pi/2 d. pi

If y=cos x ,then what is the maximum value of y (A) 1 (B) -1 (C) pi (D) 2 pi