Principal solution of `cos theta=(1)/(2)` is

The numbr of principal solution of tan 2 theta =1 is

The number of principal solutions of tan2theta=1 is

The number of principal solution of tan2theta=1 is

Observe the following A.The general solution for cos theta=(3)/(2) is theta=2n pi+-cos^(-1)((3)/(2))R . The general solution for cos theta=k is theta=2n pi+-a,n in z where theta=k is principal value,a in[0,p] and |k|<=1. Then the true statement among the following is

The principal solution of sinx=(-1)/(2) is

Select and write the correct answer from the alternatives in each of the following : The principal solution of cos^(-1)(-1/2) is :

The principal solution cosx=-(1)/(2) is

The solution of cos2theta=cos^(2)theta is:

The principal solution cosx=(1)/(2) is