What is the distance between #(0 , (-13 pi)/8 )# and #(9, pi )#?

1 Answer
Alan P.
Oct 11, 2016

#color(green)(9)#

Explanation:

(Assuming the given coordinates are in Polar form)

#(0,(-13pi)/8)# is a point at the origin (the angle of rotation is irrelevant if the radius is #0#).

#(9,pi)# is a point at a distance of #9# from the origin.

The distance between the origin [at #(0,(-13pi)/8)#]
and a point #9# units from the origin [at #(9,pi)#]

#color(white)("XXX")#is #9#

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