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proof for integration formula for /int(cot(x)dx)
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split it into cos/sin and ln it up
|dw:1316528871267:dw|
derivate of logarythm = u'/u whats the derivate of sin(x) ? It's cos(x)... so... /int cos(x)/sin(x) dx = log(sin(x)) + C
id note that you might wanna include the absolute bars for sticklers
indeed. thanks
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