SOLUTION: Let z = 4(cos 135° + i sin 135°) and w = 3(cos 45° + i sin 45°). Write the rectangular form of zw.

Algebra ->  Equations -> SOLUTION: Let z = 4(cos 135° + i sin 135°) and w = 3(cos 45° + i sin 45°). Write the rectangular form of zw.       Log On


   

Question 1032625: Let z = 4(cos 135° + i sin 135°) and w = 3(cos 45° + i sin 45°). Write the rectangular form of zw.
Answer by Alan3354(69443) About Me  (Show Source):
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Let z = 4(cos 135° + i sin 135°) and w = 3(cos 45° + i sin 45°). Write the rectangular form of zw.
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zw = 12cis(135+45) = 12cis(180)
zw = 12cos(180) = 12i*sin(180)
zw = -12