Bentuk sederhana dari Cos x/sin x+1 + cos x/sin x-1 Tolong sertakan cara ya

[tex] =\frac{cosx} {sinx + 1} +\frac{cosx} {sinx - 1}[/tex]
[tex] =\frac{cosx(sinx - 1) + cosx (sinx +1)}{sin^2x - 1}[/tex]
[tex] =\frac{2sinxcosx}{-cos^2x}[/tex]
[tex] =\frac{2sinx}{-cosx}[/tex]
[tex] = - 2tanx[/tex]