Represent in the form: x+iy the following: (a) cos(pi/2)+isin(pi/2), (b) 12[cos(3pi/2)+isin(3pi/2)].
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Represent in the form: x+iy the following: (a) cos(pi/2)+isin(pi/2), (b) 12[cos(3pi/2)+isin(3pi/2)].

[From: ] [author: ] [Date: 12-09-20] [Hit: ]
......
cos(π/2) + i sin(π/2) = 0 + 1i

12[cos(3π/2) + i sin(3π/2)] = 12 cos(3π/2) + 12i sin(3π/2)
  = 12*0 + 12i*(-1)
  = 0 - 12i
1
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