Use a Sum-to-Product Formula to show the following. sin(140°) – sin(100°) = -sin(20°) Use a Sum-to-Product Formula for Sine and simplify. sin(140°) – sin(100°) = 2 cos sin 2 sin cos sin(20°) Need Help? Read It Watch It
Use a Sum-to-Product Formula to show the following. sin(140°) – sin(100°) = -sin(20°) Use a Sum-to-Product Formula for Sine and simplify. sin(140°) – sin(100°) = 2 cos sin 2 sin cos sin(20°) Need Help? Read It Watch It
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 18E
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