limit x tends to 0 sinx/x is equal to 1|| proof in bengali in three different way

limit x tends to 0 sinx/x is equal to 1 i have described the most important formulae of limit, that limit x tends to 0 sinx/x=1 in two different ways. infact sinx/x is indeterminant form when x tends to 0. so i have proved it by l'hospital rule also. sinx/x approaches to 1 as x approaches to 0, is the most important formula of limit. I have proved limit x tends to 0 sinx/x=1 by geometrical appraoch. so viewers keep watching and comment about it.