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Top Questions
155
votes
Why do both sine and cosine exist?
trigonometry
math-history
asked Aug 31, 2015 at 16:34
math.stackexchange.com
61
votes
Layman's explanation and understanding of Einstein's field equations
general-relativity
asked Apr 29, 2015 at 15:17
physics.stackexchange.com
31
votes
How do we know what the Milky Way looks like?
visualization
milky-way
astrophotography
asked Jul 23, 2015 at 16:44
physics.stackexchange.com
23
votes
Why does a match go out if you hold it so the flame is up?
everyday-life
convection
asked May 31, 2015 at 5:40
physics.stackexchange.com
20
votes
What is a residue?
intuition
residue-calculus
asked Aug 18, 2015 at 3:26
math.stackexchange.com
13
votes
How to derive $E=mc^{2}$?
special-relativity
units
mass-energy
asked Apr 29, 2015 at 1:59
physics.stackexchange.com
12
votes
proof of $-\ln\left(2\sin\left(\frac x2\right)\right)=\sum_{k=1}^\infty \frac {\cos(kx)}{k}$?
sequences-and-series
trigonometry
asked May 31, 2015 at 5:48
math.stackexchange.com
11
votes
What makes something mathematics?
metaphysics
philosophy-of-mathematics
proof
metaphilosophy
definitions
asked Jul 23, 2015 at 16:59
philosophy.stackexchange.com
10
votes
An intuitive definition of contour integration.
soft-question
contour-integration
asked Apr 19, 2015 at 3:04
math.stackexchange.com
10
votes
Using multiple integrals for tough single integrals
integration
multivariable-calculus
big-list
asked Nov 28, 2015 at 7:14
math.stackexchange.com
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