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Physics
Z Ahmed's user avatar
Z Ahmed's user avatar
Z Ahmed's user avatar
Z Ahmed
  • Member for 5 years, 5 months
  • Last seen more than 1 year ago
  • India
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Descent on an inclined wavy frictionless track [closed]
Oct 14, 2020
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Descent on an inclined wavy frictionless track
Oct 14, 2020
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20
Integral $\int_{-\infty}^{\infty} \arctan(e^x) \arctan(e^{-x})dx=\frac{7}{4}\zeta(3)$
18
Evaluate $\int_{0}^{\infty} \frac{\sin x-x\cos x}{x^2+\sin^2x } dx$
16
Integrate $\int_{0}^{\pi} \frac{1}{1+3^{\cos x}} dx.$
15
Proving that $\sum_{k=0}^{n}\frac{(-1)^k}{{n\choose k}}=[1+(-1)^n] \frac{n+1}{n+2}.$
13
Proving $\sin(\tanh x) \ge \tanh(\sin x)$, for $x \in [0,\pi/2]$