If theta equals .79, do we multiple .79 by 2 before finding the sine, or do we find the sine and then multiply by 2?
sine of 2 theta is denoted by
$\displaystyle \sin (2 \theta)$
And the multiplication happens before the sine is applied.
There is an identity (which I'm guessing you haven't learned yet)
$\displaystyle \sin (2 \theta) = 2\sin(\theta) \cdot \cos(\theta)$