Question

If sinA=5/6, where angle A is in Quadrant 1, find the exact value of sin (1/2A)

Answer 1

you know the formula for \(\sin(\frac{A}{2})\) ?

Answer 2

if i recall it is
\[\sin(\frac{A}{2})=\pm\sqrt{\frac{1-\cos(A)}{2}}\]

Answer 3

so what you need is \(\cos(A)\) and you can then plug that number in

Answer 4

yes, ok i got that part

Answer 5

i tried doing the problem myself, may you please tell me if this answer is correct? Sin1/2A = radical6-radical11/12