Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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Question
17. The reference angle for = -420° is
(a) -60°
(b) 30⁰
(c) 60°
(d) 420°
(e) does not exist
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Transcribed Image Text:17. The reference angle for = -420° is (a) -60° (b) 30⁰ (c) 60° (d) 420° (e) does not exist
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