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+1 vote
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in Differential Calculus by (49.1k points)
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x = (1 - t2)/(1 + t2), y = 2t/(1 + t2) then dy/dx is ...

(a) - y/x 

(b) y/x

(c) -x/y

(d) x/y 

1 Answer

+1 vote
by (46.9k points)
selected by
 
Best answer

(c) - x/y

Given x = (1 - t2)/(1 + t2) and y = 2t/(1 + t2

When we put t = tan θ 

Then x = cos 2θ and y = sin 2θ

Now, 

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