If , then p(p2 - 3) is equal to
q
2q
- q
- 2q
D.
- 2q
If in the angles of a triangle are in the ratio1 : 1 : 4, then the ratio of the perimeter of the triangle to its largest side is
3 : 2
If x and y are acute angles such that cos(x) + cos(y) = sin(x) + sin(y) = , then sin(x + y) equals to