
Sin A and Cos A
Find the exact values of sin A and cos A. Write fractions in lowest terms.
http://oi48.tinypic.com/of3x5j.jpg
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.

Re: Sin A and Cos A
$\displaystyle \sin A=\frac{\text{opposite}}{\text{hypotenuse}}=\frac{ 20}{25}=\frac{4}{5}$
$\displaystyle \cos A=\frac{\text{adjacent}}{\text{hypotenuse}}=\frac{ 15}{25}=\frac{3}{5}$