Recent content by ??John's Amaranthine Love

Can someone help me with this please? I've done it, but I'm not sure whether the answer is right. The question is Given A is reflex and cos A = 1/5, find sin2A. This is my working.. sin A = -sqrt24 / 5 sin2A= 2sinAcosA = 2 x (-sqrt24 / 5) x (1/5) = -2 sqrt24 / 25 Can...