7. In which quadrant is the following true? cot 0 < 0 and csc0 < 0 1 b. 2 с. 3 d. 4 а. 8. Which of the following expressions is NOT equivalent to cos 75 a. cos(-75) с. cos 60 cos 15 – sin 60 sin 15 b. sin 90 cos 15 – cos 90 sin 15 d. sin 80 sin 5+ cos 80 cos 5
7. In which quadrant is the following true? cot 0 < 0 and csc0 < 0 1 b. 2 с. 3 d. 4 а. 8. Which of the following expressions is NOT equivalent to cos 75 a. cos(-75) с. cos 60 cos 15 – sin 60 sin 15 b. sin 90 cos 15 – cos 90 sin 15 d. sin 80 sin 5+ cos 80 cos 5
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°.
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