Question

How do you graph $y = - \cos x$?

Answer 1

In the given question, we have been given a trigonometric function. It is the negative of the cosine function. We have to graph this function. For that, we take the normal cosine function as the reference and draw the mirror image relative to the x-axis.

Complete step by step answer:
We have to graph $y = - \cos x$.
First, we graph $\cos x$,

Now, we invert it with respect to the x-axis,

And this is our required graph.

Additional Information:
In the given question, we had to graph the negative of a cosine function. For that, we took the normal cosine function as the reference and drew the mirror image relative to the x-axis. In general, when we have to graph the negative function, we take the positive as the reference and draw the mirror image relative to the x-axis.

Note:
In the given question, we had to graph the negative of a cosine function. For that, we took the normal cosine function as the reference and drew the mirror image relative to the x-axis. So, we must know the basic graphs and where, when, and how to use them so that we can get the correct result.