Hey math forum folks,

I know that f(x) = sinx is an odd function. With this knowledge, I therefore know that f(x) = sinx + x is also an odd function. However, I want to be able to prove that and I'm not sure how because I face the challenge with having to add sin pi/2 + pi/2 which I have no clue how.

I attached an image to what I have done so far (I apologize for the messy appearance).

I hope someone can help!

- Olivia