Finding Cosine from Sine Ratio

In a right triangle, the angle $ heta$ has a sine value of $\frac{3}{5}$. What is the cosine of angle $ heta$?

Recall that in a right triangle, the sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse. Similarly, the cosine of the angle is the ratio of the length of the adjacent side to the hypotenuse. You can use the Pythagorean theorem to find the length of the adjacent side.