21. ds: C is the quarter-circle r(t) = (2 cos t, 2 sin t), for 0SIS#/2.

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A:

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A:

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A: Given: -

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A:

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A:

Q: 57. Use Eq. (5) to find sin x dx.

A:

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A:

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A:

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A:

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A: We have to evaluate the given integral.

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Q: 7/2 d sin dx dx COS

A: