Evaluate csc 210°. de The reference angle is 0' = 210° – 180° = 30°. The cosecant function is negative in Quadrant III, so csc 210° = -csc 30° = -2.

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
Question
Evaluate csc 210°.
0lo bob
The reference angle is 0' = 210° – 180° = 30°. The cosecant function is negative in
Quadrant III, so csc 210° = -csc 30° = -2.
Transcribed Image Text:Evaluate csc 210°. 0lo bob The reference angle is 0' = 210° – 180° = 30°. The cosecant function is negative in Quadrant III, so csc 210° = -csc 30° = -2.
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