Derive/Prove: sin 2x = 2sin xcos x Useful Formula: cos 2x = cos?x-sin? x a. = 2 cos x-1 =1-2sin x 1+cos x 土, 2 b. cos - 1-cos x c. sin =±, 2
Derive/Prove: sin 2x = 2sin xcos x Useful Formula: cos 2x = cos?x-sin? x a. = 2 cos x-1 =1-2sin x 1+cos x 土, 2 b. cos - 1-cos x c. sin =±, 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°.
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Transcribed Image Text:Derive/Prove:
sin 2x = 2 sin xcos x
%3D
Useful Formula:
cos 2x = cos x-sin x
=2 cos x-1
a.
|
=1-2 sin? x
1+Cos x
b. cos
- COS X
c. sin-
2
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