Question

For an angle Θ with the point (5, -12) on its terminating side, what is the value of cosine

Answer 1

-5/13

Explanation:

for all FLVS students the answer is -5/13

Answer 2

For point (5, -12), the value of r is 13. Using x and r, you can now calculate the value of cosine which is determined by the formula:

cos (theta) = x/r

This gives an angle of 292.62 degrees or -67.38 degrees. Taking the cosine value, you get 0.385.