Math Help - Equations

1. Equations

Determine all solutions of each equation in radians (for x) or degrees (for theta) to the nearest tenth as appropriate.

3sin^2x - sin x - 1 = 0

Not sure how to go about this one. I can not seem to factor it out and when I use the quadratic formula, it doesnt work out. What am I doing wrong? Please help me, one more time. Im gonna hire you guys as a tutor. Hehehehe!

2. Here is the above question using LaTex:

Determine all solutions of each equation in radians (for $x$) or degrees (for $\Theta$) to the nearest tenth as appropriate.

$3\sin^2{x} - \sin{x-1}=0$

3. Let $y = sin(x)$. Then solve $3y^2-y-1=0$.