a function key a scientific calculator called TAN
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Excel math has all levels of math
prime and composite
The answer will depend on what test where, and and at what level.
Everyone who mis-spells "pi".
No, it's a word word . It's a word that spells the same thing forwards or backwards. Like ava, pertaining to birds, or the name Otto. See related answers for some more examples.There can be palindromes in math, and have to read the same way . But they are not nearly as much fun to play with.