tan (x+y) - tan y

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1+ tan(x+y) tan y

Thanks!

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- Dec 4th 2009, 04:10 PMKarlosKShow me how to reduce into a single term
tan (x+y) - tan y

---------------------

1+ tan(x+y) tan y

Thanks! - Dec 4th 2009, 04:17 PMbigwave
- Dec 4th 2009, 04:22 PMKarlosK
Very vaguely. I am taking an online course and it is difficult to learn without a book. Sometimes seeing it written out helps me to understand. Otherwise I have to scour the internet looking at examples and piecing things together. Last time I ever take an online class that is for sure

- Dec 4th 2009, 04:37 PMbigwave
$\displaystyle tan(U-V) = \frac{tanU - tanV}{1 + tanUtanV}$

if you look at it closely it is similiar to the to the given formula

so that the U value is $\displaystyle (X+Y)$ and the $\displaystyle V$ value is $\displaystyle Y$

so then $\displaystyle tan(U-V)$ is $\displaystyle tan((X+Y) - Y)$

or just $\displaystyle tan(X)$

I have taken distance learning also, but with forums like this you get lots of help some times better than a class room