A-polygon-of-nine-sides-each-of-length-2-is-inscribed-in-a-circle-the-radius-of-the-circle-ans-cosec-20-

Question Number 48852 by vajpaithegrate@gmail.com last updated on 29/Nov/18

A polygon of nine sides each of length 2

is inscribed in a circle, the radius of the

circle

ans : cosec 20

Answered by tanmay.chaudhury50@gmail.com last updated on 29/Nov/18

n i n e (09) s i d e d p o l y g o n

s o 9 θ = 360^{o} s o θ = 40^{o}

s i n 20^{o} = \frac{(\frac{a}{2})}{R}

s i n 20^{o} = \frac{1}{R} R = c o s e c 20^{o}

Commented by tanmay.chaudhury50@gmail.com last updated on 29/Nov/18

Commented by vajpaithegrate@gmail.com last updated on 29/Nov/18

tnq sir