Answer:
the second one it is a function.
A point M on the unit circle could be represented by (x , y), which coordinates are nothing but cos Ф (for x) & sin Ф (for y, hence:
tan Ф = sin Ф / cos Ф ==> tan Ф (4/5) / (3/5) ==> tan Ф =(4/3).
Now let's calculate the angle: tan⁻¹Ф ==> tan⁻¹(4/3) ≈43°
Answer:
80
Step-by-step explanation:
48/60 = x/100
48 x 100= 4,800
4,800 divided by 60=80
x= $80.00
Red: y= 2x
Black: y= 2x
Yellow: y= -3x
Green: zero slope
Blue: undefined slope
