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Alraxite

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 7 years, 11 months
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  • Last seen Sep 18 '17 at 16:53

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26 Evaluate $\cos 18^\circ$ without using the calculator Jul 7 '13
19 Intro to Real Analysis Jun 12 '14
17 Prove by contradiction that a real number that is less than every positive real number cannot be posisitve Nov 14 '13
16 What is $i$ exponentiated to itself $i$ times? Jan 16 '13
15 The negation of a limit condition, Spivak style. Jul 19 '13
12 Integral $-\int_{0}^{a}{at^{3}\,{\rm d}t\over\,\sqrt{\,\left(a^{2} -t^{2}\right)\left(b^{2}t^{2} +a^{4}-a^{2}t^{2}\right)\,}\,}$ Dec 21 '13
11 Is this correct method to prove that $a^2 + b^2 + c^2 ≥ ab + bc + ac$, when $a,b,c \geq 0$? Sep 12 '13
10 Proof by induction of Bernoulli's inequality: $(1 + x)^n \geq 1 + nx$ Aug 24 '13
8 Finding $\frac{a+b}{a-b}$ such that $a^2+b^2=6ab$ Jul 26 '13
7 How did Euler solve the 4-whole-numbers-adding-up-to-a-perfect-square problem? Dec 4 '12
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