owing identities cou

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter1: The Six Trigonometric Functions
Section1.5: More On Identities
Problem 97PS
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Question
Which of the following identities could be used to evaluate sin()
1. The half-angle formula for sine: sin() = ± √
/1
2
II. The double angle formula for sine: sin(20) = 2 sin cos
III. The sum formula for sine: sin(a + 8) = sin a cos ß ± cos a sin f
| Only
II Only
Ill Only
I and II Only
I and III Only
II and III Only
Neither I, II, or III
Transcribed Image Text:Which of the following identities could be used to evaluate sin() 1. The half-angle formula for sine: sin() = ± √ /1 2 II. The double angle formula for sine: sin(20) = 2 sin cos III. The sum formula for sine: sin(a + 8) = sin a cos ß ± cos a sin f | Only II Only Ill Only I and II Only I and III Only II and III Only Neither I, II, or III
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