4.Write the following expression as the sine, cosine, or tangent of an angle. cos175° cos55° + sin 175°sin55°. A. sin 120° B. cos 120° C. sin 230° D.cos 230° 5.The expression cos 4x cos 3x + sin4x sin3x is equivalent A. sin x B. sin 7x C. cos x D. cos 7x
4.Write the following expression as the sine, cosine, or tangent of an angle. cos175° cos55° + sin 175°sin55°. A. sin 120° B. cos 120° C. sin 230° D.cos 230° 5.The expression cos 4x cos 3x + sin4x sin3x is equivalent A. sin x B. sin 7x C. cos x D. cos 7x
Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter1: Trigonometry
Section: Chapter Questions
Problem 4T: Take this test as you would take a test in class. When you are finished, check your work against the...
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