Recall that cosine is an even function and sine is an odd function.

So .

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- April 3rd 2008, 10:10 PM #1

- Joined
- Mar 2008
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- 17

## Value of Argz

Hey guys, just another question on complex numbers:

z = cos36 - isin36, State the values of absolute z and Argz

Okay, so this is how far i can get:

z = cos(pie/5) - isin(pie/5)

z = cos(pie/5) + i(-sin(pie/5))

From there im not to sure what to do, since the sin value is negative. Please explain working out.

- April 4th 2008, 03:20 AM #2