14. Let 21 2(cos 20° + i sin 20°) and 22 = 5(cos 70° + i sin 70°). Find 21 22 and express your answer in the form a + bi. (a) 0 - 10i (b) 0 + 10i (c) 10+ 0i (d) −10+ 0i
14. Let 21 2(cos 20° + i sin 20°) and 22 = 5(cos 70° + i sin 70°). Find 21 22 and express your answer in the form a + bi. (a) 0 - 10i (b) 0 + 10i (c) 10+ 0i (d) −10+ 0i
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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Question
Transcribed Image Text:14. Let 21 = = 2(cos 20° + i sin 20°) and 22 =
5(cos 70° + i sin 70°). Find 2₁ · 22 and
express your answer in the form a + bi.
(a) 0- - 10i
(b) 0 + 10i
(c) 10+ 0i
(d) −10+ 0i
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