The principal value of `sin^(-1)(sin(2pi)/3)`

If e^(log_^2[sin^2alpha+sin^4alpha+sin^6 alpha+…to oo]) is a root of equation x^2-9x+8=0 where 0ltalphalt pi/2 then the principal value of sin^-1 ((2pi)/3) is

Write the principal value of cos^(-1)(cos((2pi)/3))+sin^(-1)(sin((2pi)/3))

Write the principal value of cos^(-1)(cos(2pi)/3)+sin^(-1)(sin(2pi)/3)

The principal values of cos^(-1)(-sin(7pi)/(6)) is

The principal values of cos^(-1)(-sin((7pi)/6)) is

What is the principal value of cos^(-1)cos((2pi)/3)+sin^(-1)sin((2pi)/3)?

What is the principal value of cos^(-1)(cos(("2pi")/3))+sin^(-1)(sin(("2pi")/3))?

The principal value of sin^(-1)[cos(sin^(-1)'1/2)] is pi/3 .

Find the principal value of tan^(-1){sin(-pi/2)}

The principal value of sin^(-1)((sqrt(3))/(2))+cos^(-1)(cos((pi)/(6))) , is :