4) Find the exact value of sin 420 cos 12°- cos 420 sin 12°
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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Transcribed Image Text:1 l 2 3.|4.l5.|6 |7. 8| 9.|10 11 12 13
4) Find the exact value of
sin 420 cos 12°- cos 420 sin 12°
U the DfferenGA Identty
sin (A-B) = sin A cos B- cos A sin B
%3D
= sin (
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