Using the quadratic formula to solve 4x^2 – 3x + 9 = 2x + 1, what are the values of x?
a: 1+-sqrt159i/8
b: 5+-sqrt153i/8
c: 5+-sqrt103i/8
d: 1+-sqrt153i/8

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.