### Home > INT2 > Chapter 4 > Lesson 4.2.4 > Problem 4-95

4-95.

** **Estelle is trying to solve for

*in the triangle at right. She lost her scientific calculator, but luckily her teacher tells her that*

Write an equation that Estelle could use to solve for

.Recall:

and Without a calculator, how could Estelle determine sin

? Explain. What angle is complementary to

?