Measure of angle 0 is 7pie/ 4 reference the angle and tan

Reference angle is and tan = -1

Step-by-step explanation:

lies in the 4th quadrant

and reference angle for angle in 4th quadrant is 2π - x , where x is the angle given.

and reference angle for is  

2π- =

and tan = -tan =  -1

Since tan is negative in 4th quadrant ,therefore value will be  negative for the given angle .

you need to give us more information since we can't answer

the graph is negative for all real values of x where   -6 < x < -2.

step-by-step explanation:

this refers to the values of f(x) in the area below the x-axis.