w**a
发帖数: 1024 | 1 f(x) = exp [ -a^2* cos(x) ] dx
what is the definite integral value of f(), 'x' is from 0 to 2*pi?
thanks. | P*******t
发帖数: 202 | 2 If a^2>0, 2*\pi*I_0(a^2)
where I is the Bessel function.
【在 w**a 的大作中提到】
: f(x) = exp [ -a^2* cos(x) ] dx
: what is the definite integral value of f(), 'x' is from 0 to 2*pi?
: thanks.
|
|
