In Problems 7788, use properties of the trigonometric functions to find the exact value of each expression.
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In Problems 77–88, use properties of the trigonometric functions to find the exact value of each expression. Do not use a calculator.
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sin (-20°) cos 380° + tan 200°
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Related Book For
Precalculus Concepts Through Functions A Unit Circle Approach To Trigonometry
ISBN: 9780137945139
5th Edition
Authors: Michael Sullivan
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