# Thread: dividing equation gives ...

1. ## dividing equation gives ...

equation 1) a=rcos(theta)
equation 2) b=rsin(theta)

diving equation 1 by equation 2 gives

tan(theta)=b/a - HOW come?

2. r cancels and it's a well known identity that $\tan \theta = \dfrac{\sin \theta}{\cos \theta}$.

You can verify it using SOHCAHTOA or the unit circle