If X = Cos2 θ and Y = Cot θ Then Find D Y D X a T θ = π 4 - HSC Commerce (Marketing and Salesmanship) 12th Board Exam - Mathematics and Statistics
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If x = cos2 θ and y = cot θ then find `dy/dx at θ=pi/4`
`x=cos^2θ and y=cot θ`
`dx/(dθ)=-2cosθ sin θ`
= `(-cosec^2θ)/(-2cosθ sinθ)`
=`1/(2sin^3 θ cos θ)`
=`(1/2sin^3θ cos θ)θ=pi/4`
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Solution If X = Cos2 θ and Y = Cot θ Then Find D Y D X a T θ = π 4 Concept: Increasing and Decreasing Functions.