the sum of the radii of inscribed and circumscribed circle of an n sides regular polygon of side a is (A) `a/2 cot (pi/(2n))` (B) `acot(pi/(2n))` (C) `a/4 cos, pi/(2n))` (D) `a cot (pi/n)`

The sum of radii of inscribed and circumscribed circles of an n sided regular polygon of side a is

Find the radius of the circumscribing circle of a regular polygon of n sides each of length is a.

If R is the radius of circumscribing circle of a regular polygon of n-sides,then R =

Find the sum of the radii of the fcircles, which are respectively inscribed and circumscribed about the a regular polygon of n sides.

Prove that the sum of the radii of the radii of the circles,which are,respectively,inscribed and circumscribed about a polygon of n sides, whose side length is a, is (1)/(2)a cot(pi)/(2n) .

The area of the circle and the area of a regular polygon of n sides and of perimeter equal to that of the circle are in the ratio of tan((pi)/(n)):(pi)/(n)(b)cos((pi)/(n)):(pi)/(n)sin(pi)/(n):(pi)/(n)(d)cot((pi)/(n)):(pi)/(n)

Value of cos((pi)/(2n+1))+cos((3 pi)/(2n+1))+cos((5 pi)/(2n+1))+ upto n terms equals

lim_(n rarr oo)n sin\ (2 pi)/(3n)*cos\ (2 pi)/(3n)