Question

Which equation is represented by the intersection of the graphs below? a. cosx=-1 b.secx=-1 c. cscx=-1 d.tanx=-1

Answer 1

Option D.

Explanation:

From the given it is clear that the horizontal line intersect the y-axis at -1. So, the equation of horizontal line is y=-1.

The curves represent the graph of
`y=\tan x`.

We need to find the equation which is represented by the intersection of the graphs.

We have two equations one is for curve and another for horizontal line.

`y=\tan x`

`y=-1`

Equate both equations to get the equation which is represented by the intersection of the graphs.

`\tan x =-1`

Therefore, the correct option is D.