Integration by parts help please
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krisshP
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#1
I need help on q3e. I don't understand how
dv/dx = 2secxsecxtanx
means that
v=sec^2x
Please explain in depth.
Thanks

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ghostwalker
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#2
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#2
(Original post by krisshP)
[A
I don't understand how
dv/dx = 2secxsecxtanx
means that
v=sec^2x
Please explain in depth.
Thanks
[A
I don't understand how
dv/dx = 2secxsecxtanx
means that
v=sec^2x
Please explain in depth.
Thanks

Alternativley, differentiate sec^2x and see what you get.
It doesn't require integration by parts.
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krisshP
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#3
(Original post by ghostwalker)
Use a substitution of u=sec x when integrating "2secxsecxtanx" wrt x.
Alternativley, differentiate sec^2x and see what you get.
It doesn't require integration by parts.
Use a substitution of u=sec x when integrating "2secxsecxtanx" wrt x.
Alternativley, differentiate sec^2x and see what you get.
It doesn't require integration by parts.

Thanks anyway.
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ghostwalker
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#4
(Original post by krisshP)
Sorry, but so far I haven't done integration by substitution, but I have done integration by parts. Maybe I should just reattempt the question after doing integration by substitution? Annoying thing is this question was actually in the chapter of integration by parts
.
Thanks anyway.
Sorry, but so far I haven't done integration by substitution, but I have done integration by parts. Maybe I should just reattempt the question after doing integration by substitution? Annoying thing is this question was actually in the chapter of integration by parts

Thanks anyway.
Split as sec d(sec)/dx
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krisshP
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ghostwalker
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user2020user
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#8
(Original post by krisshP)
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I need help on q3e. I don't understand how
dv/dx = 2secxsecxtanx
means that
v=sec^2x
Please explain in depth.
Thanks
I need help on q3e. I don't understand how
dv/dx = 2secxsecxtanx
means that
v=sec^2x
Please explain in depth.
Thanks

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krisshP
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