INTEGRATION A LEVEL MATHS PURE Help!

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joke123132
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#1
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#1
How would you integrate
sin3xcos2x
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joke123132
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#2
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#2
To make it this form
Attached files
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mqb2766
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#3
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#3
Sum identity
https://www.purplemath.com/modules/idents.htm
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joke123132
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#4
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#4
Can you elaborate further please as Im unsure what do substitute in
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username3477548
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#5
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#5
(Original post by joke123132)
To make it this form
sorry I'm just wondering, which textbook is that from?
Last edited by username3477548; 1 year ago
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mqb2766
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#6
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#6
(Original post by joke123132)
Can you elaborate further please as Im unsure what do substitute in
Have you looked at the sum identity in the link? Have a go at matching the relevant one.
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achieve526kk
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#7
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#7
use sin(A+B)=sin(A)cos(B)+cos(A)sin(B)
sin(A-B)=sin(A)cos(B)-cos(A)sin(B)
A=3X, B=2X
GOOD LUCK
Last edited by achieve526kk; 1 year ago
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joke123132
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#8
(Original post by Qxi.xli)
sorry I'm just wondering, which textbook is that from?
edexcel year 2 pure
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joke123132
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#9
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#9
(Original post by achieve526kk)
use sin(A+B)=sin(A)cos(B)+cos(A)sin(B)
sin(A-B)=sin(A)cos(B)-cos(A)sin(B)
A=3X, B=2X
GOOD LUCK
ty i got it!!
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username3477548
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#10
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#10
(Original post by joke123132)
edexcel year 2 pure
oh ok thanks x
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Äries
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#11
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#11
Application of trigonometric formulae in integration:
Change product to sum of difference
Change square or cube of trigonometric ratios to double or triple angles, to remove the index powers.
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