# Math Help - Need help with last step (finding COS)

1. ## Need help with last step (finding COS)

I'm trying to review my notes and I understand everything until the very last step. Where does the "divided by 2" come from?

2. ## Trigonometry

The trigonometrical ratio of cos is given by base/hypotenuse
So,
In your question base is √3 and hypotenuse is 2.
So,your 2 has come from hypotenuse.

3. Hello, Lovely07!

There's an obvious typo . . . recall what the question is asking.

The last line should be: . ${\color{blue}\cos\theta} \:=\:\frac{\sqrt{3}}{2}$

4. Thank you very much to both for your help.