mekata thawath kramayak menna.
{4 cos^2 x -3}/{cos^5 x - cos^5 (π/6)}
3 kiyana eka api 4cos^2(π/6) kiyala liya gaththoth,
={4 cos^2 x -4cos^2(π/6)}/{cos^5 x - cos^5 (π/6)}
=4 {cos^2 x -cos^2(π/6)}/{cos^5 x - cos^5 (π/6)}
dan api simawa me widiyata wenas karala
lim
cosx-cosπ/6---0
udai...