Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
8th Edition
ISBN: 9781305652224
Author: Charles P. McKeague, Mark D. Turner
Publisher: Cengage Learning
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Fundamentals of Trigonometric Identities
Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.
Question

Find the exact value of the expression using the provided information.

Find sin(s + t) given that cos s = - 1/4, with s in quadrant III, and cos t=-3/5 with t in quadrant III

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