SOLUTION: perform the indicated operation, using polar form. 4cis pie * 3cis(-pie over 2) b) 2(cos pie + i sin pie) * 5( cos 3pie over 4 + i sin 3pie over 4)

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: perform the indicated operation, using polar form. 4cis pie * 3cis(-pie over 2) b) 2(cos pie + i sin pie) * 5( cos 3pie over 4 + i sin 3pie over 4)      Log On


   

Question 384772: perform the indicated operation, using polar form.
4cis pie * 3cis(-pie over 2)

b) 2(cos pie + i sin pie) * 5( cos 3pie over 4 + i sin 3pie over 4)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
perform the indicated operation, using polar form.
4cis (pie) * 3cis(-pie over 2) = 12*cis(pi/2)
b) 2(cos pie + i sin pie) * 5( cos 3pie over 4 + i sin 3pie over 4)
= 10(cis(pi + (3/4)pi))
= 10(cis((7/4)pi)
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Cheers,
Stan H.