# Math symbol for in terms of

1. Jan 7, 2008

### nanoWatt

math symbol for "in terms of"

If there was a simple trig problem like express cos(x) / tan(x) in terms of sin(x).

I can't seem to find the mathematical symbol for doing "in terms of". I'm learning on my own, and don't yet have my calculus book, so I'm just reviewing sample problems, but they just say "in terms of" without any symbols.

I know the answer is 1/sin(x) - sin(x)

But for myself, I'm just wondering.

2. Jan 7, 2008

### Ben Niehoff

I don't think there is a symbol for that phrase.

3. Jan 7, 2008

### robert Ihnot

Apparently they lack a symbol, that's why the write it out: "In terms of.."

4. Jan 7, 2008

### symbolipoint

You need to make use of identities to convert all functions into equivalent forms using only sin(x). Your exercise problem should already be designed for this to be possible.
Do you have a specific exercise as an example?

5. Jan 7, 2008

### nanoWatt

I pretty much know the answer:

cos(x) / tan(x) in terms of sin(x) = 1/sin(x) - sin(x)

I didn't need help solving it. I just wondered if there was a mathematical construct for in terms of.