(Angry)(Headbang)

I have 2 questions:

can somebody help me with these 2 questions showing working out?

- find for z ; where z^3=sqrt[imaginary]
- Simplify: sin x/(1-cos x)

Please & Thank You

Printable View

- March 16th 2009, 09:57 PMn7167113trigonometric
(Angry)(Headbang)

I have 2 questions:

- find for z ; where z^3=sqrt[imaginary]
- Simplify: sin x/(1-cos x)

Please & Thank You - March 16th 2009, 10:28 PMSoroban
Hello, n7167113!

Quote:

Find

We know: . ,

Use DeMoivre's Formula for the six roots of: .

Quote:

Simplify: .

Multiply by

. .

- March 16th 2009, 10:33 PMcoolguy99
For the simplification one, try multiplying both the numerator and denominator by (1+cos(x)), and from there you should be able to get a nice answer

edit> I was beat to the punch :p