1) Solve trigonometric equation (sin x)(2cos x-1) = 0 in interval [0,360°)
2) Compute exact value of sin^-1 (sin 5pi / 6)
3) Compute exact value of cos^-1 (tan 5pi / 4)
4) For parabola give by (y-5)^2 = 8(x+2) , Compute the following:
a) Direction parabola opens (to the left, right, up or down)
b) Vertex
c) Focus