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precalculus
calculus
What is a good way to explain why `sin^-1(sin((3pi)/2))=pi/2`?

 1 answer available 
2005-08-15 		Kathy (MLC LIA)
kathy@mathtoearth.org
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algebra
What is the definition of an imaginary number?

Prove `sqrt(-4) = 2i`, using
your definition.

Argue the merits and ramifications of your definition from
various points of view
such as simplicity, rigorousness, usage of traditional
functions for notation,
notational effects on the other fields of mathematics,
etc.

 1 answer available 
2005-08-15 		Katsu (MLC Tutor)
katsu@mathtoearth.org
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geometry
There is a place that has equal distances to all the coasts (seashore lines) of
the United States.
Where is it located?

 No answers available [Answer]
2005-08-16 		Katsu (MLC Tutor)
katsu@mathtoearth.org
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calculus
number theory
trigonometry
Prove that `e` and `pi` are irrational numbers.

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2005-08-17 		Katsu (MLC Tutor)
katsu@mathtoearth.org
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