Mathematics
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Abhijit

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

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23 What would have been our number system if humans had more than 10 fingers? Try to solve this puzzle. Aug 6 '13
22 Solve $\cos^2x-\sin^2x= 1$ Mar 14 '13
15 How to find the value of $\sin{\dfrac{\pi}{14}}+6\sin^2{\dfrac{\pi}{14}}-8\sin^4{\dfrac{\pi}{14}}$ Mar 30 '13
11 How to prove $\cos\left(\pi\over7\right)-\cos\left({2\pi}\over7\right)+\cos\left({3\pi}\over7\right)=\cos\left({\pi}\over3 \right)$ Mar 31 '13
10 Trying to find a function whose derivative is $\cfrac{4x^3}{x^4+1}$ any ideas? Mar 19 '13
9 How can I prove that $xy\leq x^2+y^2$? Apr 10 '13
8 Show that $\frac{\sin x}{\cos 3x}+\frac{\sin 3x}{\cos 9x}+\frac{\sin 9x}{\cos 27x} = \frac{1}{2}\left(\tan 27x-\tan x\right)$ Mar 28 '13
8 Prove $ax^2+bx+c=0$ has no rational roots if $a,b,c$ are odd Mar 24 '13
7 What would have been our number system if humans had more than 10 fingers? Try to solve this puzzle. Aug 6 '13
5 Simultaneous Equations year 9 please solve Mar 19 '13
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