If you have a lot of time on your hands,
here are some infinite series you can use
to find the values of common
trigonometric functions.
x3 x5 x7
sin x = x - ---- + ---- - ---- + ...
3! 5! 7!
x2 x4 x6
cos x = 1 - ---- + ---- - ---- + ...
2! 4! 6!
1 2 17
tan x = x + - x3 + -- x5 + --- x7 + ...
3 15 315
Yeah, I'm sure the terms for tan are obvious to you, too,
but just in case, the n-th term is
22n(22n - 1 ) Bn
---------------- x2n-1
(2n)!
Where Bn is Bernoulli's Number.
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