Question

check answer and question @SolomonZelman

Answer 1

I used a calculator, but how would I solve using a unit circle (if possible)?

Answer 2

you need no unit circ.
You have a tangent of 4/3, that means:

Answer 3

so the cosine, would be pretty simple after that

Answer 4

oh, duh, lol. Thanks. :)

Answer 5

yw

Answer 6

I knew there was a way you could solve that was easy but no calc, but I couldn't remember...my brain is fried. too many review questions, practice tests, and semester finals...