If x = 3 cot t – 2 cos3 t, y = 3 sin t – 2 sin3 t, find 
.
Formula: –
given: –
x = 3 cot t – 2 cos3 t, y = 3 sin t – 2 sin3 t
differentiating both w.r.t t
And 
differentiating both w.r.t t
Now,
= cot t
differentiating both w.r.t x
48
If x = 3 cot t – 2 cos3 t, y = 3 sin t – 2 sin3 t, find .
Formula: –
given: –
x = 3 cot t – 2 cos3 t, y = 3 sin t – 2 sin3 t
differentiating both w.r.t t
And
differentiating both w.r.t t
Now,
= cot t
differentiating both w.r.t x