my work is attached below! thanks

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- Jan 3rd 2007, 09:40 AM #1

- Joined
- Dec 2006
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- 3

- Jan 3rd 2007, 10:00 AM #2
As I'm working from my apartment, can I just take this opportunity to say

"Hi honey, I'm home!"

(Apologies.)

Any way...

1A and 1B are correct. Though I must say that it is quicker to use the equivalent equation: $\displaystyle s = r \theta$ where s is the arc length, r is the radius, and $\displaystyle \theta$ is the angle is radians.

2. Your answer here is correct for the positive answer. Now you need a negative version.

3. $\displaystyle sin(-145\pi/3) = -sin(145\pi/3) = -sin(145\pi/3 - 24(2\pi))$ <-- This step is to reduce the angle to something easier to work with.

$\displaystyle sin(-145\pi/3) = -sin(\pi/3) = -\sqrt{3}/2$

-Dan