Américo Tavares
Reputation
28,781
142/100 score
 Apr 5 awarded Good Answer Mar 11 awarded Popular Question Mar 9 awarded Good Answer Feb 24 awarded Popular Question Feb 5 reviewed Leave Open How does computing the determinant of a matrix with unit vectors give you the Cross Product? Feb 5 reviewed Leave Open Why is that if $z^n = |z|^2$, then $|z| = 1$? Jan 27 awarded Announcer Jan 23 comment How do I prove: $\cos (\theta + 90^\circ) \equiv - \sin \theta$ @user3788135 $\cos (\theta +90^{\circ})<0$ and $\cos (\theta+90^{\circ})=-|OB|/|OQ|=-|OB|/1=-|OB|$. Jan 21 revised Changing polar coordinates: Calculating $\iint_R\dfrac{dxdy}{\sqrt{x^2+y^2}}$ where $R=\{(x,y):1\leq x^2+y^2\leq 2, x\leq0, y\geq0\}$ edited tags Jan 21 revised Continued fraction and order of a real number Improved TeX-code Jan 21 revised Proving $x = y$ or $x = -y$ when $x^n = y^n$ and $n$ is even added 39 characters in body Jan 20 revised Prove that the integral of $\frac{dx}{\sqrt{x-x^2}}$ is equal to $2\sin^{-1}\sqrt x+C$ using $u = \sqrt{x}$. Fixed TeX-code in title and added tag Jan 18 revised Proving $x = y$ or $x = -y$ when $x^n = y^n$ and $n$ is even Completed TeX-code both in the title and in the question Jan 18 revised Proving $x = y$ or $x = -y$ when $x^n = y^n$ and $n$ is even added 548 characters in body Jan 5 answered Proving $x = y$ or $x = -y$ when $x^n = y^n$ and $n$ is even Dec 29 reviewed Leave Open Prove that the function is bijection Dec 26 awarded Nice Answer Dec 17 revised How do I find the maximum volume for a box when the corners are cut out? added 14 characters in body Dec 17 revised How do I find the maximum volume for a box when the corners are cut out? changed picture Dec 16 revised How do I find the maximum volume for a box when the corners are cut out? deleted 7 characters in body