What is the distance between #(2 , (5 pi)/8 )# and #(-1 , (2 pi )/3 )#? Trigonometry The Polar System Polar Coordinates 1 Answer P dilip_k Mar 16, 2016 #=sqrt((5+4cos(pi/24))# unit Explanation: Distance #=sqrt(r_1^2+r_2^2-2r_1r_2cos(theta_1-theta_2))# #=sqrt((2)^2+(-1)^2-2*2*-1*cos(5pi/8-2pi/3))# #=sqrt((5+4cos(pi/24))# Answer link Related questions What are Polar Coordinates? How do you find the polar coordinates of the point? What is the difference between a rectangular coordinate system and a polar coordinate system? How do you graph polar coordinates? What careers use polar coordinates? How do you plot the point #A (5, -255^\circ)# and the point #B (3, 60^\circ)#? What does a polar coordinate system look like? How do you find the distance between 2 polar coordinates? For the given point #A(-4, frac{pi}{4})#, how do you list three different pairs of polar... How do you find the rectangular form of #(4, -pi/2)#? See all questions in Polar Coordinates Impact of this question 1912 views around the world You can reuse this answer Creative Commons License