Find 
, when
If x = ecos 2 t and y = esin 2t, prove that 
Here , 
Differentiating it with respect to 
using chain rule ,
……(1)
And, 
Differentiating it with respect to 
using chain rule ,
……(2)
dividing equation (2)by (1),
[
]
15
Find , when
If x = ecos 2 t and y = esin 2t, prove that
Here ,
Differentiating it with respect to using chain rule ,
……(1)
And,
Differentiating it with respect to using chain rule ,
……(2)
dividing equation (2)by (1),
[]