SOLUTION: Express -5(cos pi/2 +isin pi/2) in rectangular form. I got -5i. Is this correct?

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Express -5(cos pi/2 +isin pi/2) in rectangular form. I got -5i. Is this correct?      Log On


   

Question 937382: Express -5(cos pi/2 +isin pi/2) in rectangular form.
I got -5i. Is this correct?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
This looks right
+cos%28+pi%2F2%29+=+0+
+sin%28+pi%2F2+%29+=+1+
+-5%2A%28+0+%2B+1%2Ai+%29+=+0+-+5i+
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You can show the +0+ just
to remind yourself that it has
a real part