Evaluate sin 110° sin 250° + cos 540° cos 290° cos 430° cos² 1260°

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 88E
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Evaluate
sin 110° sin 250° + cos 540° cos 290° cos 430°
cos² 1260°
Transcribed Image Text:Evaluate sin 110° sin 250° + cos 540° cos 290° cos 430° cos² 1260°
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