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# Solution for Sin X = 2 T 1 + T 2 , Tan Y = 2 T 1 − T 2 , Find D Y D X ? - CBSE (Science) Class 12 - Mathematics

ConceptSimple Problems on Applications of Derivatives

#### Question

$\sin x = \frac{2t}{1 + t^2}, \tan y = \frac{2t}{1 - t^2}, \text { find } \frac{dy}{dx}$ ?

#### Solution

$\sin x = \frac{2t}{1 + t^2}\text { and } \tan y = \frac{2t}{1 - t^2}$
$\Rightarrow x = \sin^{- 1} \frac{2t}{1 + t^2} \text { and y } = \tan^{- 1} \frac{2t}{1 - t^2}$
$\Rightarrow x = 2 \tan^{- 1} t \text { and y } = 2 \tan^{- 1} t$
$\Rightarrow \frac{dx}{dt} = \frac{2t}{1 + t^2} \text { and } \frac{dy}{dt} = \frac{2t}{1 + t^2}$
$\therefore \frac{dy}{dx} = \frac{\frac{dy}{dt}}{\frac{dx}{dt}} = \frac{\frac{2t}{1 + t^2}}{\frac{2t}{1 + t^2}} = 1$

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Solution Sin X = 2 T 1 + T 2 , Tan Y = 2 T 1 − T 2 , Find D Y D X ? Concept: Simple Problems on Applications of Derivatives.
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