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Is f(X)= 20-X-cos X, increasing always? ...

Is `f(X)`= `20-X-cos X`, increasing always? Justify your answer.

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MODERN PUBLICATION-APPLICATIONS OF DERIVATIVES-PROBLEM
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  3. Is f(X)= 20-X-cos X, increasing always? Justify your answer.

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  4. State where y = sin x attains a maximum value in the interval [0,pi].

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  10. For what value of k,f(x) = kx^3+3 is decreasing?

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  15. Find the equation of normal to the circle x^2+y^2 = 5 at (2,1).

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  18. Find the points on the curve 9y^2 = x^3 where the normal to the curve ...

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