My son is seven times older than my grandson and i am 12 times older than my grandson. if you add all our ages together, the sum is 100 years. can you tell me my age in years? 50 years old 55 years old 60 years old 65 years old 70 years old

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.