### Home > A2C > Chapter Ch4 > Lesson 4.1.2 > Problem 4-30

4-30.

Solve for the indicated value. Leave your answer in exact form.

_______Use the Pythagorean Theorem.

_______Use the Pythagorean Theorem to find the missing side. Is the triangle a special one?

This is a

triangle. Therefore, is .

____The inverse tangent function will be helpful here.

_______Use the cosine ratio or special right triangles.