Q12 of 354 Page 11

Find , when

and

as


Differentiating it with respect to t using chain rule ,






……(1)


Now ,


Differentiating it with respect to t using chain rule ,






……(2)


dividing equation (2) by (1),




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10

Find , when

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Find , when

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Find , when

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If x = 2cos θ – cos 2θ and y = 2sin θ – sin 2θ, prove that