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定积分计算器 可以用数值积分的方法，计算出一个函数在确定积分区间上的定积分。 要求的定积分也可以在函数图所在的x-y平面上用标记的区域来表示。 支持的函数和运算

2019年4月4日 · I want to show that $\int_0^\infty |\frac {\sin (x)} {x}|dx=\infty$. I thought it would work out by using the power series of the sine but I'm just not getting the endresult. Could someone please hel...

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2012年12月30日 · abs (sinx)为偶函数。 f (x)=1/2A0 + sum {An cosnx}。 A0= (2/pai) ∫ [0,pai] sinx=2/pai，An= (2/pai) ∫ [0,pai] sinxcosnx自己算吧

2019年6月26日 · I know form wolfram alpha: https://www.wolframalpha.com/input/?i=integral+of+abs (sin (x)) that the integral is $-\cos (x)\text {sgn} (\sin (x))$ where sgn$ (x)$ is the sign of x, sgn function explained o...

2020年6月14日 · Integral of Absolute Value of sin (x) | Integral | Calculus | Definite Integral This video explains this interesting integral, and I converted to it absolute value of sin (x), and then...

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Definite Integral Calculator computes definite integral of a function over an interval using numerical integration. Definite integral could be represented as the signed area in the XY-plane bounded by the function graph as shown on the image below.

Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…