Matlab question, just checking If i inputted correctly.

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Homework Statement


upload_2015-7-12_15-20-35.png


Homework Equations

The Attempt at a Solution


07IYl0C.png

look at line4, did I enter it correctly?
I must have did something wrong because there is no contour at all, all i see are parallel lines.
 
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You are probably intending to use element-by-element multiplication, but you have used matrix multiplication. You need to use the .* operator instead.
 
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Last edited:
You need to explain whether you solved the problem or not. It's now unclear whether you need help or not.
 

Thread 'Prove that the integral is equal to ##\pi^2/8##'

Prove $$\int\limits_0^{\sqrt2/4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx = \frac{\pi^2}{8}.$$ Let $$I = \int\limits_0^{\sqrt 2 / 4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx. \tag{1}$$ The representation integral of ##\arcsin## is $$\arcsin u = \int\limits_{0}^{1} \frac{\mathrm dt}{\sqrt{1-t^2}}, \qquad 0 \leqslant u \leqslant 1.$$ Plugging identity above into ##(1)## with ##u...
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