SOLUTION: find each of the following 2(cos 225 degrees+ i sin 225 degrees)/4(cos 105 degrees + i sin 105 degrees)? and find 2(cos 225 de

Question 115271: find each of the following 2(cos 225 degrees+ i sin 225 degrees)/4(cos 105 degrees + i sin 105 degrees)?
and find
2(cos 225 degrees + i sin 225 degrees) x 4(cos 105 degrees + i sin 105 degrees)
please help thanks
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
2(cos 225 degrees+ i sin 225 degrees)/4(cos 105 degrees + i sin 105 degrees)
= (4/2)cis(225-105)
= 2cis(120)
===================
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)
==================
Cheers,
Stan H.

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