If `y=cos^(-1)(cosx),t h e n(dy)/(dx)` at x=`(5pi)/4` is equal to (a)1 (b)-1 (c)0 (d)4

If y=sin^(-1)(cos x) , then ((dy)/(dx)) at x=(24 pi)/(29) is equal to (A) 1 , (B) -1 , (C) (24 pi)/(29) , (D) (-24 pi)/(29)

If y=cos^(-1)(cos x) then (dy)/(dx) at x=(5 pi)/(4) is (i) 1( ii) -1( iii) (1)/(sqrt(2))( iv) sqrt(2) at x=(5 pi)/(4) is (i)

If y=cosx.cos4x.cos8x , then what is (1)/(y)(dy)/(dx) at x=(pi)/(4) equal to?

If y=log sqrt(tan x), then the value of (dy)/(dx) at x=(pi)/(4) is given by oo(b)1(c)0(d)(1)/(2)

If x=a cos^(4)t, y=b sin^(4)t then (dy)/(dx) at t = (3 pi)/(4) is

If y=e^( sinx ) the value of (dy)/(dx) at x=(pi)/(2) is , (a) 1 , (b) e , (c) 0 ,(d) not defined .

If y=tan^(-1)((sinx+cosx)/(cosx-sinx))," then "(dy)/(dx)" at "x=(pi)/(4)

If 8f(x)+6f((1)/(x))=x+5 and y=x^(2)(f(x), then (dy)/(dx) at x=-1 is equal to 0( b) (1)/(14)(c)-(1)/(4)(d) None of these

If y=cos^(-1)((1)/(2sin x)) then (d^(2)y)/(dx^(2)) at ((pi)/(4),(pi)/(4)) is