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If x = a cos^(3) theta, y = a sin ^(3) t...

If x = `a cos^(3) theta, y = a sin ^(3) theta then sqrt(1+((dy)/(dx))^(2))`=?

A

` |tan theta |`

B

` |sectheta |`

C

` tantheta `

D

`sec theta`

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The correct Answer is:
B
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NIKITA PUBLICATION-DIFFERENTIATION -MCQ
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  7. If x= 3tan theta ,y =3cosec theta, then " at " theta =(pi)/(6) ,(dy)/...

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  9. if x=a cos^(4) theta, y= a sin^(4) theta, "then" (dy)/(dx)"at" theta=(...

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  10. If x=sin tcos 2t,y= cos tsin 2t ,then " at " t= (pi)/(4) ,(dy)/(dx)

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  11. Ify=1- cos theta, x =1 - sin theta,then (dy)/(dx) " at " theta = (pi)/...

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  12. If x =theta -sin theta ,y=1 -cos theta ,then " at " theta =(pi)/(2) ,...

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  13. If x=a ( theta -sin theta ) ,y=a(1-cos theta ) ,then (dy)/(dx) =

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  14. If x =a sqrt( sectheta -tan theta) ,y=a sqrt(sectheta +tan theta ), t...

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  15. If x =3 cos t-2cos ^(3) t,y =3 sin t- 2 sin ^(3) t,then (dy)/(dx) =

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  18. If x=2cos theta -cos 2theta ,y=2sin theta -sin 2theta ,then (dy)/(dx)...

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  19. यदि x=a sin 2theta (1+ cos 2theta ),y =bcos 2theta (1-cos 2theta ), ...

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  20. If x=a ( tcos t- sin t ) ,y =a ( tsin t +cos t ),then (dy)/(dx) =

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