3. If sin e = -2/3 and 180° & e s 270°, find the exact value of the following: (a) sin 2 e = (b) cos /2= an20=2sinO COS o %3D - 2/3 4. If cos e = 7/8 and 270°

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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May you help me solve 3a-4b?
Guac3
If sin e = -213 and 180° k e < 270°, find the exact value of the following:
3.
(a) sin 2 e =
(b) cos º/2=
an20=2sinO COS o
- 2/3
3
4.
If cos e = 7/8 and 270° < e < 360°, find the exact value of the following:
(a) cos 20 =
(b) sin /2=
Transcribed Image Text:Guac3 If sin e = -213 and 180° k e < 270°, find the exact value of the following: 3. (a) sin 2 e = (b) cos º/2= an20=2sinO COS o - 2/3 3 4. If cos e = 7/8 and 270° < e < 360°, find the exact value of the following: (a) cos 20 = (b) sin /2=
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