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Mathematics
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Botond

A second-year physics student with a lot of stupid question.

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  • Member for 3 years, 4 months
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  • Last seen 54 secs ago

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Top Posts (298) All Questions Answers | Votes Newest

13 Does Euler's formula give $e^{-ix}=\cos(x) -i\sin(x)$? Apr 13 '18
9 Is it true that if $A^4 = I$, then $A^2 = \pm I$? Feb 25 '18
8 Why we say $i^2 = -1$ while it is $1$ Nov 29 '17
8 Why doesn't integration by substitution work in this case? Jun 8 '18
8 If $a,b\ge 0$ and $a,b \in \mathbb{R}$, then prove $\frac{a+b}{2}\ge\sqrt{ab}$ Nov 3 '18
7 Perpendicular vector from $(\cos(\theta)x, \sin(\theta)x)$ Mar 25 '18
7 Graphing the binomial coefficients: appearances? Mar 16 '18
6 What's the deal with this $\frac1\pi$? Feb 6
6 Evaluating $|f(x)-g(x)|$ Jun 28 '18
5 Solve $y'' + 3y'+2y = \cos(at)$ by first solving $y'' + 3y'+2y = \delta(t)$ Jun 24 '18
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