March 30, 2015

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?Precalc - write the rectangular equation x^2+y^2=6 in polar form. I do not ...
Math - Can somebody please explain to me how to factor trinomials that contain ...
trig - 6. Compute the modulus and argument of each complex number. I did a-c and...
Math - I already figured most of these out, but I need to learn how to SHOW MY ...
physics - A resistor (R = 900 ), a capacitor (C = 0.25 µF), and an inductor (L...
Trigonometry - rectangular form to polar form xy=12 rsinʟ rcosʟ=12 would the ...
precalc - Rewrite 3y^2 + 6y + 108x - 969=0 in standard form, show work.
precalc - Parabola: Rewrite 3y^2 + 6y + 108x - 969=0 in standard form, show work...
precalc - write 196x^2-256y^2+17=12561 in standard form, show work.
Mathematics - Express the Complex Number -1-i in polar form. how is complex no ...