User tryst with freedom

20 votes

3 answers

835 views

Geometric proof of $\cos A + \cos B + \cos C + \cos (A+B+C) = 4 \cos \frac{A+B}{2} \cos \frac{B+C}{2} \cos \frac{A+C}{2}$

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2 answers

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1 answer

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8 votes

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550 views

In general, in a string of multiplication is it better to multiply the big numbers or the small numbers first?

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7 votes

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654 views

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7 votes

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6 votes

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6 votes

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6 votes

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6 votes

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6 votes

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6 votes

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Good applied differential geometry books

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6 votes

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6 votes

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5 votes

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Understanding the formula for curvature

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654 Questions

Geometric proof of $\cos A + \cos B + \cos C + \cos (A+B+C) = 4 \cos \frac{A+B}{2} \cos \frac{B+C}{2} \cos \frac{A+C}{2}$

Quadratic formula in differential equations

Finding result of composing operations many times

Should I tick a multiple choice question at random or not in an exam with different weight for correct and wrong answer?

If two metric spaces are homeomorphic, what more conditions are required so that their balls are homeomorphic?

Can chess moves be identified as a meaningful algebraic structure?

In general, in a string of multiplication is it better to multiply the big numbers or the small numbers first?

Why is the Lebesgue Integral defined through integrals of simple functions?

Generalizing trig-sum to product using complex exponentials

Why do sometimes care for where vectors originate from and sometimes not? and exactly how many kinds of vectors are there?

What does distance of a point from line being negative signify?

A geometric/intuitive proof of why shortest distance between two non-intersecting curves lie along the normal

Thinking of the limit as a functional..?

Parallel transport on the Group manifold

Good applied differential geometry books

Computing the Dehn Invariant for a cube (Numberphile)

When does a maximal sub topology not containing an open set exist?

Is there anyway to quantify how difficult a statement is to prove in Mathematics?

How restricted is the curvature of a manifold by choice of topology keeping the underlying set fixed?

Graph theory for friendship in three cities

Constructing a polynomial with integer coefficient's sharing roots with another two polynomials

Shortest path in conformal maps of a surface

Interpreting combinatorics in the language of generating functions

L'hopital rule fails with limits to infinity?

Can we use infinite series to multiply finite polynomial series?

How does the total derivative account for dependencies behind variables (intuitively)?

When converting a Riemann sum to an integral, how does one decide the bounds of the converted Riemann sum?

Optimizing a quadratic in one variable with parameterized coefficients

Finding a general way to sum $ \sum_{i=1}^{i=n} i^k$ for a given 'k' using elementary highschool calculus [duplicate]

Understanding the formula for curvature