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30 Sep 2005, 12:27
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1
Radical Edward
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Join Date: Feb 2002
Location: South Pacific
Posts: 4,911
Help with Integration
I have a horrible integration which I have whittled down to a few easily integrable terms, but one of them is giving me pain, can anyone here help?
here it is:
(cos(A)sin(B)sin(2B))/(sin(A+B)cos(A+B))
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30 Sep 2005, 12:50
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2
Radical Edward
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Location: South Pacific
Posts: 4,911
Re: Help with Integration
just to clarify, I am looking to simplify that equation. A is also a function of B.
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30 Sep 2005, 14:01
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3
acropolis
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Join Date: Jul 2000
Location: Pittsburgh
Posts: 3,280
Re: Help with Integration
heh
1 / ( SinA / (tanB sinB) + SinA TanA / Sin B + CosA / SinB + SinA/CosB )
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30 Sep 2005, 14:20
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4
Radical Edward
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Location: South Pacific
Posts: 4,911
Re: Help with Integration
which trig identities did you use for that?
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30 Sep 2005, 14:25
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5
acropolis
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Location: Pittsburgh
Posts: 3,280
Re: Help with Integration
sin(x + y) = sin x cos y + cos x sin y
cos(x + y) = cos x cosy + sin x sin y
is the only non-trivial one i used.
does A = Pi/2 - B
by any chance? that sure would be nice.
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30 Sep 2005, 15:01
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6
Nodrog
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Join Date: Jun 2000
Posts: 8,476
Re: Help with Integration
Why not just use maple/mathematica like everyone else who wants to integrate things outside of a tedious methods class?
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