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Math

Trigonometry

Use an appropriate Half-Angle Formula to find the exact value of the expression. cos(15°)

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter3: Radian Measure

Section3.1: Reference Angle

Problem 96PS: Use a reference angle to find the exact value of cos210o. a. 12 b. 32 c. 22 d. 12

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Question

Use an appropriate Half-Angle Formula to find the exact value of the expression.

cos(15°)

Figure in plane geometry formed by two rays or lines that share a common endpoint, called the vertex. The angle is measured in degrees using a protractor. The different types of angles are acute, obtuse, right, straight, and reflex.

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