Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 8 - Test - Page 412: 6c



Work Step by Step

We know that $\cos90^{\circ}=0$ and $\sin90^{\circ}=1$ Substituting these values in the expression and solving: $3(\cos90^{\circ}+i\sin90^{\circ})=3(0+1i)=3i$ Therefore, the rectangular form is $3i$.
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