`sin^-1(sin((2pi)/3))`

Let alpha = tan^-1 (1/2)+tan^-1(1/3) , beta=cos^-1(2/3)+cos^-1(sqrt5/3) , gamma=sin^-1(sin((2pi)/3))+1/2cos^-1(cos((2pi)/3)) then cosalpha+cosbeta+cosgamma is equal to (A) (sqrt(2)-1)/2 (B) (sqrt(2)+1)/2 (C) (sqrt(2)+sqrt(3))/2 (D) ((sqrt(3)-sqrt(2))/2)

Evaluate: sin^(-1)(sin((3pi)/5))

sin^(-1)sin((3pi)/5)

The value of sin^(-1)(sin((3pi)/(5)))

The value of sin^(-1)(sin'(3pi)/(5)) is "….."

The value of sin^(-1)(sin'(3pi)/(5)) is "….."

If sin^-1 x+sin^-1=(2pi)/3, then cos^-1 x cos^-1 y is equal to

If sin^-1 x+sin^-1=(2pi)/3, then cos^-1 x cos^-1 y is equal to

Prove that: sin^3A+sin^3((2pi)/3+A)+sin^3((4pi)/3+A)=-3/4sin3Adot

The positive integer value of n >3 satisfying the equation 1/(sin(pi/n))=1/(sin((2pi)/n))+1/(sin((3pi)/n))i s