Trigonometric Equations/Identities - SOLVING

[cirteomonogirt]

Here is the question along with a diagram I drew.

http://i41.tinypic.com/63u3p3.png

I've been trying to figure it out for the last few days, need it done in the next 1-2hours.

 

[tkhunny]

I'd start by drawing the radii perpendicular to the three sides of the triangle. There are then many right triangles to ponder.

Let's see where you are going.

 

[cirteomonogirt]

I'd start by drawing the radii perpendicular to the three sides of the triangle. There are then many right triangles to ponder.

Let's see where you are going.

I honestly have no idea what to do. What I did was draw that diagram. I then split the page in two (just an imaginary line) Labeled one left side and the other right side. Said one side of the equation for one side and the other side of the equal sign on the other side of the page. Then tried substituting things from other formulas like the trig identities.

 

[tkhunny]

I honestly have no idea what to do.

This is incorrect. Did youread my post? I guess it could be correct if you didn't read it.

 

[cirteomonogirt]

Are you serious?

If you have NO IDEA what to do, why were you given the problem?

I don't know why I was given the problem. It was given to me and I have to solve it.

I'd start by drawing the radii perpendicular to the three sides of the triangle. There are then many right triangles to ponder.

Let's see where you are going.

I don't understand what you want me to do. Draw the radius of the circle so it is vertical forming a cross with the bottom of the triangle? I don't see what to do after that? am I substituting parts of that equation with trig. identities or not?