Question

Which function's graph is shown below?

Answer 1

Answer:

y=cos x

Step-by-step explanation:

Answer 2

Answer:

A. y = cos x

Step-by-step explanation:

The function that we see graphed has the point (0,1), this means whichever trig function f(x) it represents f(0) = 1.

Now, only the cosine function has the property that cos(0) = 1, thus choice A is the correct answer.