Maths - not a pipers favourite subject

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9 years 2 months ago #8857 by Munga
Hi Guys

Just wondering if anyone can differentiate these equations, for underground pressure on a cylinder.

-2/π ʃₒⁿ cosβ ʃₒᵝ q sin(β-α)dα dβ.........equation-1

rR -1/π ʃₒⁿ ʃₒᵝ qrsin(β-α)dα dβ............equation-2

q and r are constants so the only thing needing differentiating is ʃₒᵝ sin(β-α)dα dβ

I get this

sin(β-α) = sin(β) x cos(α) - cos(β) x sin(α)

ʃ f(β-α)dx = -sin(β) x sin(α) - cos(β) x cos(α)

Is it right ....that is the question....?

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9 years 2 months ago - 9 years 2 months ago #8858 by Munga
Replied by Munga on topic Maths - not a pipers favourite subject
cos(β-α)

Someone on the maths forum solved it for me.
Last edit: 9 years 2 months ago by Munga.

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