# Hi!

• Jan 3rd 2007, 09:40 AM
honey
Hi!
my work is attached below! thanks :)
• Jan 3rd 2007, 10:00 AM
topsquark
Quote:

Originally Posted by honey
my work is attached below! thanks :)

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: $s = r \theta$ where s is the arc length, r is the radius, and $\theta$ is the angle is radians.

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