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d/ dx { tan^ −1 ( cosx/ (1+...

`d/ dx { tan^ −1 ( cosx/ (1+sinx) ) }` equals (a)1/2 (b) −1/2 (c) 1           (d) -1

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  10. If f(x)=|x^2-9x+20| , then f^(prime)(x) is equal to (a) -2x+9 for all ...

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  11. If f(x)=sqrt(x^2-10 x+25) , then the derivative of f(x) in the inte...

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  12. If f(x)=|x-3| and g(x)=fof\ (x) , then for x > 10 , g^(prime)(x) is eq...

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  18. If siny=xcos(a+y) , then (dy)/(dx) is equal to (a)(cos^2(a+y))/(cosa) ...

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  19. If y=log((1-x^2)/(1+x^2)) , then (dy)/(dx)= (a)(4x^3)/(1-x^4) (b) -(4...

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  20. If y=sqrt(sinx+y) , then (dy)/(dx) equals (a)(cosx)/(2y-1) (b) (cosx)/...

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