00:01
Hello, students.
00:01
So in this question here, it is given here that l of x comma y is equal to half of x square minus half omega square x square.
00:15
Now condition is at x t equal to zero is equal to zero here.
00:22
And x t equal to t is equal to here.
00:26
X right now omega is 0 .3 here and time period this is 1 .9 and x is here 4 point now will you lagrange's equation so d by d d by del x minus del x by del x is here 0 so we can write here this is d of t t of x plus omega square x is here zero now from here we can say that x is equal to e raised to power m t or we can write it here x is here m e raised to power empty now going further here we can write here m square plus omega square that is multiplied by e -t -to -power m t is equal to 0.
01:41
So m is equal to plus minus i omega.
01:46
Emt is not equal to zero.
01:50
Now x of t is here.
01:53
A cos omega -t plus b sine omega -t.
02:01
Now x at t equal to zero is here.
02:04
So this is 0.
02:07
A cos omega t, we'll put t here 0, plus b sine omega 0.
02:20
So here we are getting this as a cost omega 0.
02:24
So this is here a...