### Home > PC3 > Chapter 9 > Lesson 9.1.4 > Problem 9-90

9-90.

Calculate the exact value of is in Quadrant IV,

*is in Quadrant II. Hint: Calculate*

Sketch two triangles for this situation. One for angle and one for angle

*.*

9-90.

Calculate the exact value of is in Quadrant IV,

Sketch two triangles for this situation. One for angle and one for angle