" 2f.) "(1)/(cos(x-a)cos(x-b))

If int(dx)/(cos(x-a)cos(x-b))=(1)/(A)[log((f(x))/(g(x)))]+c , then

If f(x)=cos((log)_e x),\ t h e n\ f(1/x)f(1/y)-1/2{f(x y)+f(x/y)} is equal to a. "cos"(x-y) b. log(cos(x-y)) c. 0 d. "cos"(x+y)

If f(x)=(4cos^(4)x-2cos^(2)x-(1)/(2)cos4x+2sin^(2)x-x^(9))^((1)/(9)) then the value of f(f(2)) is equal to

If f(x)=cos^(-1)x+cos^(-1){(x)/(2)+(1)/(2)sqrt(3-3x^(2))} then

If f(x)=(4cos^(4)x-2cos2x-(1)/(2)cos4x-x^(7))^((1)/(7)) then

Let f(x)=(2cos x-1)(2cos2x-1)(2cos2^(2)x-1)...(2cos2^(n)x-1) (where n>=1). Then prove that f((2 pi k)/(2^(n)+-1))=1AA k in I

The value of f(1) so that the function f(x)=(1-cos(1-cos x))/(x^(4)) is continuous everywhere is (A) (1)/(2)(B)(1)/(4)(C)(1)/(8)(D)2

If f(x)sin x cos xdx=(1)/(2(b^(2)-a^(2)))ln f(x)+c, then f(x) is equal to (1)/(a^(2)sin^(2)x+b^(2)cos^(2)x)(b)(1)/(a^(2)sin^(2)x-b^(2)cos^(2)x+b^(2)cos^(2)x+b^(2)cos^(2)x)(d)(1)/(a^(2)cos^(2)x-b^(2)cos^(2)x)

A: (d)/(dx ) {Tan ^(-1) ((a cos x + b sin x)/(b cos x - a sin x))=1 R: (d)/(dx) {Tan ^(-1) ((a cos f (x) +b sin f (x))/(b cos f (x) -a sin f (x)))}=f'(x)

Find f'(x), if f(x)= tan^(-1) ""sqrt((1-cos2x)/(1+cos2x))