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数值计算,用Julia语言会快很多:
function sinx(x)
x2 = x^2
xn = x
fn = 1
p = false
s = x
t = x
i = 3
while t > 0.00001
xn *= x2
fn *= i*(i-1)
t = xn/fn
if p == true
s += t
p = false
else
s -= t
p = true
end
i += 2
end
return s
end
sinx(pi/6)