1) Given that cos theta = -1/3 and theta is in quadrant 3, find tan 2 theta?
2) Given that cos theta =-0.5 and theta is in quadrant 2 find sin theta over 2?
3) Given that tan 2 theta = 3/4 and 2 theta is in quadrant 1, find tan theta?
4) cos x =-3/5 in the quadrant 2 and sin y= 4/5 in the quadrant 1. Evaluate sin(x+y)
I need help with these four questions