Using the trigonometric sum and difference identities, simplify the following: Cos(70)cos(40) + sin(70)sin(40)
Using the trigonometric sum and difference identities, simplify the following: Cos(70)cos(40) + sin(70)sin(40)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE:
1. Give the measures of the complement and the supplement of an angle measuring 35°.
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Using the trigonometric sum and difference identities, simplify the following:
Cos(70)cos(40) + sin(70)sin(40)
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