Comment on Activity 2

1. The trigonometric functions of `theta` are the ratios of sides of the triangle, `sin theta = a text[/] c,``cos theta = b text[/] c,` and `tan theta = a text[/] b.`
2. From part a, `(sin theta)/(cos theta)=(a text[/] c)/(b text[/] c)=a / b=tan theta.`