Question

If √[(1 - cosA)/2] = x, then the value of x isOptions:1) cos(A/2)2) tan(A/2)3) sin(A/2)4) cot(A/2)

Answer 1

the answer is option 3) sin(A/2)

Answer 2

We know according the trigonometry formula

1-Cosa = Sin^2 a/2

Thus in the question

root (1-CosA) / 2 = x
so

Sin A/2 = x
Thus the answer is 3 option