In right triangle trigonometry, explain why cos 60°= ½, regardless of the actual size of the triangle.

1. In right triangle trigonometry, explain why cos 60°= ½, regardless of the actual size of the triangle.

2.  You are given the value of tan θ. Is it possible to find the values of all the other trigonometric functions without finding the actual measure of the angle θ?

3.  Can you give an example in your work (or home life) where you need to work with triangles?