Question

helppp

Answer 1

sinx/cosx=tanx, its a trig identity

Answer 2

We have
\[ \mu W \cos \theta= W \sin \theta \]
Divide both sides by W
we get
\[ \mu \cos \theta=\sin \theta\]
Divide both sides by cos theta
\[\mu=\frac{\sin \theta}{\cos \theta}\]
We get
\[\mu =\tan \theta\]

Answer 3

yay thanks i got the same answer :D i was checking