`x=(sqrt(p^2+q^2)+sqrt(p^2-q^2))/(sqrt(p^2+q^2)-sqrt(p^2-q^2))` then `q^2x^2-2p^2x+q^2=?` (A)   `3`   (B)   `-1`   (C)   `-2`   (D)   `0`   

 (2sec theta + 3 tan theta + 5 sin theta -7cos theta + 5) / (2tan theta + 3 sec theta + 5 cos theta + 7sin theta + 8) = (a) tan (theta / 2)  c  (ceta (theta / 2)                                (c) sec (theta / 2)         (d)     cosec (theta / 2)      Â

The set of values of sec^(-1)(1/2) is "……….."

The set of values of sec^(-1)(1/2) is "……….."

What is the value ofLsin 34Â^@ cos 236 -sin 56Â^@ sin 124Â^@COs 28Â^@ cos 88Â^@+ cos 178Â^@ sin 208Â^@(a) -2124(b) -1(c) 2(90(d) 1

If f(x) = |cosx| , then f'(pi/4) is equal to "……."

If f(x) = |cosx| , then f'(pi/4) is equal to "……."

A , B , P, Q and R are five points in a plane. Show that the sum of the vectors AP → , AQ → , AR → , PB → , QB →  and RB →  is 3 AB → .