April 20, 2014

Homework Help: Trig/PreCalc

Posted by tabby on Friday, April 13, 2012 at 3:44pm.

Teach me how to express 5sqrt3 - 5i in polar form please.

I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc.

Its a multiple choice homework question with answer choices:
a: 10(cos 11pi/6 + i sin 11pi/6)
b: 10(cos 11pi/6 - i sin 11pi/6)
c: 5 (cos 11pi/6 + i sin 11pi/6)
d: 10(cos 5pi/3 + i sin 5pi/3)

I did as much work as I could guess at, and came up with r=10sqrt2,
arctan=1/sqrt3 which equals sqrt3/3.I know that sqrt3/3 = tan 30 and 210 degrees. But now I am stuck.
Where do I go from here - or is this even the right way to try to solve this equation? Please help me.

Answer this Question

First Name:
School Subject:

Related Questions

trig - 6. Compute the modulus and argument of each complex number. I did a-c and...
math - express the following in form of a+bi: (5i)(-3/5i)
algebra - Solve problem. Telephoto lens. find the image distance i for an object...
Algebra II-please check - Write the polynomial in simplest form with roots 4, 5i...
Precalc - Write the complex number z = 2 + 5i in polar form, rounding to the ...
algebra 2 - are these answers right? 1. -121 = i11 2. -2-144 = 2i144 = ...
Math - Express 5(sqrt3-5i) in polar form. I don't undersand. Please and Thank ...
trig - U=5i+11j and V=2i-3j, find 2U-7U
Algebra - All real # x and y that satisfy -2x-1+2yi=4x-5i first step is place ...
math - Solve and simplify (3+9i)-(12-5i) 8+6i/7-5i