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If x=thetasin2theta,y=thetacos2theta," ...

If `x=thetasin2theta,y=thetacos2theta," then "(dy)/(dx)" at "theta=(pi)/(4)` is

A

`-(pi)/(2)`

B

`(pi)/(2)`

C

`-(1)/(2)`

D

`(1)/(2)`

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The correct Answer is:
A
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MARVEL PUBLICATION-DIFFERENTIATION-MULTIPLE CHOICE QUESTIONS (TEST YOUR GRASP - II : CHAPTER 11)
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  12. d/(dx)[sin^(- 1)(x-(4x^3)/27)]= 4x327dx

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  13. (d)/(dx)(sec^(2)x*csc^(2)x)=

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  14. If y=log((1)/(1-x))," then: "(dy)/(dx)-1=

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  15. If y=4^(log2(sinx))+9^(log3(cosx)," then "(log2(log3)y(1)=

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  16. If y=cos((1)/(2)cos^(-1)x)," then "(dx)/(dy)=

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  21. If 3x^(2)+4xy-5y^(2)=0," then: "(dy)/(dx)=

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