Question 291009
{{{y-2sin(theta)=3}}} Start with the given equation.



{{{y=2sin(theta)+3}}} Add {{{2sin(theta)}}} to both sides.



{{{f(theta)=2sin(theta)+3}}} Replace 'y' with {{{f(theta)}}}. 



You may be tempted to use 'x' (since f(x) is probably very familiar to you), but you'll see that there is no 'x' terms at all. More importantly, {{{theta}}} is the variable in question, which is why we're using {{{theta}}} instead of 'x'.



We're doing this last step to make a function (we're just changing notation). So this means that the answer is choice (4).