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4.14 Derivatives of Functions In Parametric Form
THEOREM : If x = f ( t ) and
y = y ( t ) are two derivable functions
of t such that y is defined as a function of x, then
= 
Example 65 If x = at2 and y = 2 at
Find
Solution : x = at2
= 2 at and y = 2 at
= 2a
= 
= 
= 
Example 66 If 
= 
and
y = 
= 
=
= 
= 
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