# Quick math quesiton

1. Feb 12, 2005

tan(theta) + tan(theta) is equal to tan(2theta) right? just want to make sure

2. Feb 12, 2005

### learningphysics

No. tan(theta) + tan(theta) is just 2tan(theta).

tan(2theta)=2tan(theta)/(1-tan^2(theta))

3. Feb 12, 2005

### vincentchan

NO....
$$tan \theta + tan \theta = 2 tan \theta = tan 2 \theta ( 1-tan^2 \theta)$$

4. Feb 12, 2005

yea first i thought that tan(theta) + tan(theta) was 2tan(theta), but it didnt make sense for some reason cause it's 2*tan(theta), if you did a integral, can you take out the 2? to look like $$2\int tan(theta)$$

maybe i'm thinking too much, cause it's really really late right now, well i'm going to get some sleep. thanks for the help

Last edited: Feb 12, 2005
5. Feb 12, 2005

### Nylex

Yes and what you have is 1*tan (theta) + 1*tan (theta).

An integral. Yes you can take the 2 out. You missed the d(theta) as well .