Given sinx=3/5\sin x = 3/5sinx=3/5 and xxx is in the second quadrant, what is cos(x/2)\cos(x/2)cos(x/2)?
1/101/\sqrt{10}1/10
−1/10-1/\sqrt{10}−1/10
3/103/\sqrt{10}3/10
−3/10-3/\sqrt{10}−3/10