" 2."cos^(-1)3x/5

If x_1=cos^(-1)(3/5)+cos^(-1)((2sqrt2)/3)and x_2=sin^(-1)(3/5)+sin^(-1)((2sqrt2)/3) , then

If x_1=cos^(-1)(3/5)+cos^(-1)((2sqrt2)/3)and x_2=sin^(-1)(3/5)+sin^(-1)((2sqrt2)/3) , then

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

If cos^(-1)(5/13)+cos^(-1)(3/5)=cos^(-1)x then x=

Prove that cos^(-1)(3x-4x^3)=3cos^(-1)x,x in[1/2,1]

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

cos^(-1)((3+5cos x)/(5+3cos x))=

If quad x_(1)=cos^(-1)((3)/(5))+cos^(-1)((2sqrt(2))/(3)) and x_(2)=sin^(-1)((3)/(5))+sin^(-1)((2sqrt(2))/(5))