3/18/09

I have done three problems and need verification of my answers.

1. Write the rectangular equation x=3 in polar form. My answer: rcostheta=3

2. Simplify {(sq. root of 3) + i}^4 My answer: 8 + 8(sq.root3i

3. Find (costheta+isintheta)^2 My answer: cos^2theta - isin^2theta

Thank you in advance for your help.