# Calculus problems

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12) What is limit as h approaches 0 of [cos(pi/2 + h) - cos(pi/2)] / [h]

Ans is -1. Explain.

14) The area of the region in the first quadrant between the graph of y=x times the

sqrt of (4-x^2) and the x axis is? Ans is 8/3. Explain.

15) If x^2 + y^3 = x^3y^2, then dy/dx = ? Explain.

Ans is [3x^2y^2 - 2x] / [ 3y^2 - 2x^3y]

16) limit as x approaches infinity of x^2/xlnx =?

Ans is infinity? Explain.

15) Integral of lnx/x dx. Answer is (ln x)^2/ 2 + C. Explain

18) For which of the following functions does d^3y/dx^3 = dy/dx?

I. y=e^x

II. y=e^-x

III. y=sinx

Ans is I and II.

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There are a variety of problems for calculus that involve limits, integrals and area

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12) Let , we know . Thus we have

14) Let . Set , ...

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