The measure on angle 0 is 7pie/4. measure of its reference angle is __ °, and the tan 0 is

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.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.