# Homework Help: SohCahToa couldn't figure it out without the angle θ

1. Oct 29, 2012

### NeedHelp12

1. The problem statement, all variables and given/known data

2. Relevant equations
Sin θ = Opp/Hyp
Cos θ = Adj/Hyp

3. The attempt at a solution
I tried to reverse it, but I couldn't figure it out without the angle θ

Last edited by a moderator: Feb 6, 2013
2. Oct 29, 2012

### frogjg2003

Re: SohCahToa

What about the Pythagorean Theorem?

3. Oct 29, 2012

### NeedHelp12

Re: SohCahToa

I need help solving....

4. Oct 29, 2012

### frogjg2003

Re: SohCahToa

What is the Pythagorean Theorem?

5. Oct 29, 2012

### jey1234

Re: SohCahToa

What frogjg said. The Pythagorean Theorem says that when you have a right angled triangle like the one in your picture. The length of the longest side squared is equaled to the sum of the squares of the shorter sides.

Mathematically, (if "a" is the hypotenuse and "b" and c" are the shorter sides)

a2 = b2 + c2

Should be pretty straight forward from here on.

First figure out what is your "a" ,"b" and c".

If you don't understand the theorem, this video might be useful: http://www.khanacademy.org/math/algebra/ck12-algebra-1/v/pythagorean-theorem

Last edited: Oct 29, 2012