## anonymous one year ago The point (3, -4) is on the terminal side of an angle . What is cos theta ?

1. anonymous

*Is on the terminal side of of angle theta

2. anonymous

the answers choices: -3/5 3/5 -3/4 3/4 3

3. anonymous

This is the right triangle. $\cos \theta=\frac{ adjacent }{ hypotenuse }$ The adjacent side is 3. Find the hypotenuse |dw:1436185096039:dw|

4. anonymous

how? @peachpi

5. anonymous

is it 25?

6. anonymous

the pythagorean theorem a² + b²=c²

7. anonymous

you have to take the square root of 25

8. anonymous

so it is 5

9. anonymous

yes

10. anonymous

so would the answer to my question be 3/5?

11. anonymous

yes

12. anonymous

ok, thank you!

13. anonymous

you're welcome