Given the following pairs of a pre image triangle, A(1,3), B(-2,6), and C(0,-2), what are the new ordered pairs of the image after translation along the vector <-1,1>?

Idon’t know what the answer is i wish i could

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

Iam unsure about what the proof is, therefore as much as wish to i can not.