We haven't done a Trigonometry problem in a while, so here we go! Evaluate: -Dan
Follow Math Help Forum on Facebook and Google+
Do you know any half angle formulas? Do you know what ? So what are and ? Once you have that the rest is easy.
That serves as a good hint. -Dan
No final takers? Here's my solution. Spoiler: I prefer a slightly different approach than that given by HallsofIvy: So for we get Similarly Adding these gives 3/2. -Dan
View Tag Cloud