SOLUTION: Please help me with this problem: Compute the value of {{{(2 cis 20 degrees)(3 cis 25 degrees)}}} and write the answer in rectangular form.( All numbers must be exact.)

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Question 988003: Please help me with this problem:
Compute the value of %282+cis+20+degrees%29%283+cis+25+degrees%29 and write the answer in rectangular form.( All numbers must be exact.)
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
2(cos(20°) + i*sin(20°))*3(cos(25°) + i*sin(25°)) = 6(cos(20°+25°) + i*sin(20°+25°)) = 6(cos(45°) + i*sin(45°)) = 6%2A%28sqrt%282%29%2F2+%2B+i%2Asqrt%282%29%2F2%29 = 3sqrt%282%29+%2B+i%2A3sqrt%282%29.