Question 115271
2(cos 225 degrees+ i sin 225 degrees)/4(cos 105 degrees + i sin 105 degrees)

= (4/2)cis(225-105)

= 2cis(120)
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and find
2(cos 225 degrees + i sin 225 degrees) x 4(cos 105 degrees + i sin 105 degrees)

= (2*4)cis(225+105)

=  8cis(330)

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Cheers,
Stan H.