A step in trig expression simplification, from a textbook:
$$\frac {\cos(x)+\sin(x)}{\cos(x)-\sin(x)}\to\frac{1+\tan(x)}{1-\tan(x)}$$
Please give a hint as to how this transformation was achieved.
A step in trig expression simplification, from a textbook:
$$\frac {\cos(x)+\sin(x)}{\cos(x)-\sin(x)}\to\frac{1+\tan(x)}{1-\tan(x)}$$
Please give a hint as to how this transformation was achieved.
Divide the numerator and denominator by $\cos x$.