# Thread: help with hw-trig functions and values

1. ## help with hw-trig functions and values

hey, I'm new so I hope I am doing this right.

I missed some class so I'm kind of unsure how to solve some problems that are due tomorrow.

1) csc (pie/3) and I have to find the exact value. I wasn't sure if I just put that all under 1 and use sin or what.

2) sin(-300 degrees)...I got square root 3/2...I have no idea if that's correct

3) sec (-510 degrees)

thanks for any help!

2. 1) what's csc?

2) correct

3) sec x is $\displaystyle \frac{1}{\cos x}$ and the answer is $\displaystyle -\frac{2}{\sqrt{3}}$

3. csc=cosecant, inverse of sin

4. Originally Posted by WWTL@WHL
1) what's csc?
$\displaystyle csc$ here is short for cosecant. it is defined as follows.

$\displaystyle \csc x = \frac {1}{\sin x}$

thus, $\displaystyle \csc \frac {\pi}3 = \frac 1{\sin \frac {\pi}3}$

now continue

@ zerostumbleine33, and by the way, it is spelt "pi"

5. Ah yes. I've never seen it abrev. to csc is all.

Thanks Jhevon.