## Algebra and Trigonometry 10th Edition

Note: tan(x) = $\frac{sin(x)}{cos(x)}$ Note: cot(x) = $\frac{1}{tan(x)}$ Using the above notes: $\frac{cos(x)}{sin(x)}$ = $\frac{1}{\frac{sin(x)}{cos(x)}}$ = $\frac{1}{tan(x)}$ = cot(x) Therefore: $\frac{cos(x)}{sin(x)}$ = cot(x)