1. If sin 0 =, find the exact value of the following, with <0
Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Analytic Trigonometry
Section2.4: Sum And Difference Formulas
Problem 3ECP: Find the exact value of cosu+v given sinu=1213, where 0u2 and cosv=35, where 2v.
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Step 1
Given:
Step 2
Formulae to be used:
For any angle,
Step 3
a)
Since,
Therefore,
Plug , to get
But lies in second quadrant and cosine function gives negative values in second quadrant.
Hence,
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