How do you do these three Integral Calculus Problem?

Question

2.31
ò ...... . sin (4.3 x) dx =
0.52

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2.5
ò .... .(2.73x^2 - 8.41x + 7) dx =
0.5


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4
ò ... . (1/x)(sin x) dx =
1

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= -0.36

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= 2.27

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= 0.659

Answer 1

the first one you should know yourself, if you dont look at a table, its basic.

Second one, break it up into 3 integrals and sum. Theyre just polynomials

the third one, integrate by parts.

thats how you solve them