SOLUTION: I am having lots of trouble in this area of math, but I'm ask to write the complex number in rectangular form. 7(cos 3pi/2+ i sin3pi/2) If you can't give answer, help me lear

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: I am having lots of trouble in this area of math, but I'm ask to write the complex number in rectangular form. 7(cos 3pi/2+ i sin3pi/2) If you can't give answer, help me lear      Log On


   

Question 398957: I am having lots of trouble in this area of math, but I'm ask to write the complex number in rectangular form.
7(cos 3pi/2+ i sin3pi/2)
If you can't give answer, help me learn how to solve this, my tutor is away this week.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
7(cos 3pi/2+ i sin3pi/2)
= 7*cos(3pi/2) + 7i*sin(3pi/2)
= -7sqrt(2)/2 + 7isqrt(2)/2
or = 7sqrt(2)/2*(-1 + i)