Question

Which equation is represented by the intersection of the graphs below? +2 -7 -6 -5 -4 -3 -2.1 1 2 3 4/5 6 7 1 -2 T O A. tanx = 1 B. Cos X = 1 C. sin x = 1 O D. secx = 1

Answer 1

Notice that the graph given in red color is the graph of the function:

`y=\cos x`

Notice also that the graph in blue is the graph of the function:

`y=1`

The points of intersection of these graphs will be the points where the functions have equal values.

Hence, the required equation can be derived by equating the functions:

`\cos x=1`

Hence, the correct option is B.

The answer is option B: cos x=1.