Question

What is the arc length of an angle of 7π 6 radians formed on the unit circle? A) π 6 B) 5π 6 C) 7π 6 D) 5π 6

Answer 1

x=cost
y=sint
so x^2+y^2=1
could be represented parametrically 
and you would take
Integral
sqrt (1-(dx/dt)^2+(dy/dt)^2) from 0 to 7pi/6
Note, I'm note sure if this is the correct integration formula

Answer 2

Answer:

C

Step-by-step explanation: