# Math Help - Sin A and Cos A

1. ## Sin A and Cos A

Find the exact values of sin A and cos A. Write fractions in lowest terms.

That is the problem. Is anyone able to explain to me how I find the answer? This trig stuff is really confusing me. You guys have been so helpful to me. Thank you so much.

2. ## Re: Sin A and Cos A

$\sin A=\frac{\text{opposite}}{\text{hypotenuse}}=\frac{ 20}{25}=\frac{4}{5}$

$\cos A=\frac{\text{adjacent}}{\text{hypotenuse}}=\frac{ 15}{25}=\frac{3}{5}$