I'm very confuzzled as to where the variable is here. I don't know where to differentiate.
Here's the question, differentiate:
$$y = \frac{\sin(\theta)}{2} + \frac{c}{\theta}$$
Do I solve for $f(c)$ or $f(\theta)$? I tried solving it for $f(c)$ treating theta as a constant, but I'm unsure if that's correct.