" Is "cos^(-1)((3+5cos x)/(5+3cos x))" is equal to "

cos ^(-1) ((3+5 cos x )/(5+3 cos x )) is equal to : a) tan ^(-1) ((1)/(2) tan ""(x)/(2)) b) 2 tan ^(-1) (2 tan ""(x)/(2)) c) (1)/(2) tan ^(-1) (2 tan ""(x)/(2)) d) 2 tan ^(-1) ((1)/(2) tan ""(x)/(2))

(1)/(3+5 cos x)

If y = "cos"^(-1) ((3 + 5 cos x)/(5 + 3 cos x)) , prove that cos x = 2 tan^(-1) (1/2 tan (x/2) )

int(cos x)/(3cos x-5)dx

int(cos5x+cos4x)/(1-2cos3x)dx " is equal to "

The expression (cos 6 x+6 cos 4 x+15 cos x+10)/(cos 5 x+5 cos 3 x+10 cos x) is equal to

If cos(sin^(-1)(3/5)+cos^(-1)x)=0 then x is equal to

Prove that ""(1)/(2)cos^(-1)""((5cos x+3)/(5+3 cos x))= tan^(-1)""((1)/(2)tan""(x)/(2))