In the triangle below, Four-fifths represents which ratio?

Right triangle A B C is shown. Side A B has a length of 4, side B C has a length of 5, and side A C has a length of 3.

sinC

sinB

cosC

tanB

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.