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jarod83

integration

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cos(x) - sin(x)

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Think about how the derivatives of sin and cos relate to each other, and then work backwards. The idea being that integration is sort of anti-differentiation.

Miles

[EDIT: should homework threads be discouraged entirely?]

[edited by - Miles Clapham on September 13, 2002 7:22:33 AM]

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quote:
Original post by Beer Hunter
∫sin(x) + cos(x) dx = ∫sin(x) dx + ∫cos(x) dx

That's the first step

Or even ∫ f(x) dx = ∫ sin(x) + cos(x) dx

[EDIT: Thanks Beer Hunter ]

[edited by - Miles Clapham on September 13, 2002 8:13:43 AM]

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And what about this one:

f(x) = (sin(x) + cos(x))^2

on my calculator I get "(cos(x))^2 + 1", and I calculate it to "x".

Can anyone help???

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Miles Clapham - for the integration sign, you have to type ∫

everything else

jarod83 - I guess you'd multiply that out, integrate each term individually, then simplify... but I can't check it right now.

[edited by - Beer Hunter on September 13, 2002 8:15:25 AM]

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