Use $\triangle PIN$ to answer the following questions.

1. Find the exact length of $\overline{I N}$.

   Hint (a):

   Use the Pythagorean Theorem.

2. Find the ratio for $\cos P$.

   Hint (b):

   $\cos(P) = \frac{\text{adjacent}}{\text{hypotenuse}}$

3. Find the ratio for $\sin P$.

   Hint (c):

   $\sin(P) = \frac{\text{opposite}}{\text{hypotenuse}}$