Express 9[cos(60°) - isin(60°)] in the form a + bi

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 18E
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Express 9[cos(60°) - isin(60°)] in the form a + bi
Transcribed Image Text:Express 9[cos(60°) - isin(60°)] in the form a + bi
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