Question

For each angle θ, find the exact values of cos θ and sin θ.

1. 225°

Answer 1

do you know about the way the values of sines and cosines are repeated? I mean, the pattern.

Answer 2

@Leahc246 ?

Answer 3

I don't believe I do at the moment. I am trying to teach myself calc and this problem came up. Can the answers only be 0 or 1?

Answer 4

@gudden

Answer 5

no... for both, sine and cosine, the values range between -1 to 1

and have your ever looked over the following formulas?

Answer 6

I have seen those before! @gudden

Answer 7

cool.. now try to divide 225, into a multiple of 90 + something.

and you'd get 180 + 45

now, apply the respective formula on any the lengthy counterpart..