Help plz!!!

Nov 2015
17
0
Baltimore
If a=20, can you express the length of x in terms of the trigonometric ratios of theta.Screen Shot 2015-12-02 at 9.56.12 PM.png
 

Prove It

MHF Helper
Aug 2008
12,897
5,001
Yes, you already have a right angle triangle you can get the lengths for in terms of theta, and if you cut it so you can get a rectangle on the bottom and a triangle on the top you can evaluate those lengths in terms of theta as well. Then x should drop out.
 
Sep 2015
27
10
New Jersey
Look at the right triangle whose longer leg is x.

We can compute its hypotenuse, h, since tan ⊝ = h/20.

Also, the smaller acute angle of the triangle is 90 - ⊝.

That should be all you need.