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by mettamage
836 days ago
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What’s the best way to calculate it by hand? I’m brushing up my math basics (I graduated CS while dodging the math requirements) and it frustrates me that in trig I need to remember values at all. The values such as sqrt(2)/2 make sense but how hard is it to calculate sin(5 degrees) by hand? |
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0 is a decent approximation of sin near 0.
x is a better one.
x - x^3/6 is an even better one.
x - x^3/6 + x^5/120 ...
Note that x here is in radians rather than degrees so convert (degrees * pi/180) first. Repeat until you're satisfied with how many stable digits you get