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

9-90.

Calculate the exact value of sec(*a* + *b*) where *a* 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 sec(*a* + *b*) where *a* is in Quadrant IV, * *is in Quadrant II. Hint: Calculate

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