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Displaying 1011 - 1020 of 1214
A solution to a probabilistic Putnam Exam Problem is presented.
A short proof of the well-known fact that the unit interval \([0,1]\) is uncountable is presented by means of a simple infinite game. The author also used this game to show that a (non-empty)...
Three lemmas of interest in themselves from which Euler's Triangle Inequality follows are proved wordlessly.
A triangle labeled two different ways verifies the double angle formula for sines.
The authors discuss ways to induce students to recognize the use of symmetry to evaluate challenging integrals, and to prevent student sidesteps.