Friday

July 25, 2014

July 25, 2014

Posted by **Lucy** on Tuesday, September 30, 2008 at 3:45pm.

1) Evaluate (1+i)^12 by using DeMoivre's Theorem. Express the result in rectangular form.

So far I have: r=sqrt(1)^2+(1)^2 which simplified is sqrt2. Don't know how to proceed.

2) Write the polar equation theta = 45 degrees in rectangular form.

I don't even know how to proceed to do this.

Any help would be great!

- Pre-calculus -
**bobpursley**, Tuesday, September 30, 2008 at 4:02pm(1+i)^12 is sqrt2 @ 45 to the 12th power, or sqrt2 ^12 @45x12

1@45 is .707i + .707j where i,j are unit vectors in the x,y directions.

- Pre-calculus -
**Kate**, Wednesday, May 6, 2009 at 8:42pmx = r cos(45) ...(1)

y = r sin(45) ...(2)

Dividing (2) by (1):

y / x = tan(45) = 1

y = x.

- Pre-calculus -
**lily**, Thursday, July 9, 2009 at 2:43pmfind the distance between points at (6,-3) and (-1,4). The answer I got was 9.9 and it was wrong.

please help!

**Related Questions**

Pre-Calculus - Could someone help me with this-we learned this today in school ...

pre-calc - Can someone check my work please? Convert each polar equation to a ...

math - I have to find an exact solutions on the interval [0,pi) for both of ...

Math - 1)Find the standard deviation of the data set to the nearest tenth. (21,...

Precalculus - Given: f(x) = X^2-x evaluate: f(sqrt2 + 3) I have worked out this ...

Pre-Calc - Could someone please check these-I had tried one last night but it ...

Math - use Demoivre's Theorem to find the indicated power of the complex number...

Math - use Demoivre's Theorem to find the indicated power of the complex number...

Calculus I Theorem - I factored and simplified dy/dx of 192x^5 + 96x^3 + 12x all...

Pre-Calculus - Please check my answer: I think it's correct? 1.Find polar form ...