In other words, I don't believe trigonometry is a prerequisite for college.
It depends on what you want to major in...... trig is not very important to majors like Literature, Psychology, Foreign Languages, and so forth. But if you intend to major in ANY technical field, whether Engineering, pure science, or Mathematics, you are dead meat without it. In fact, I can tell horror stories about what happens to students who enter an Engineering & Science track in college without Calculus. Suffice to say you can't do Calculus without knowing some trig, and you can't do freshman Physics without Calculus.
As further evidence of the importance of trig to a technical major, I offer you the MIT cheerleader's favorite chant:
I rest my case....
;-)