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May
1
revised Evaluate the $\lim_{x \to \ -\infty} (x + \sqrt{x^2 + 2x})$
added 69 characters in body
Apr
30
revised Prove that $\int_{0}^{\frac{\pi}{2}}{\frac{\sin(2n+1)x}{\sin(x)}dx}=\frac{\pi}{2}$ for $n\ge0$
added 6 characters in body
Apr
22
revised Wolfram answer is different for the integral $\sqrt{\frac{x}{2-x}}dx$
edited body
Apr
17
revised If a chord joining the points $P(a\sec\alpha,a\tan\alpha)$ and $Q(a\sec\beta,a\tan\beta)$ on the hyperbola $x^2-y^2=a^2$ is a normal to it at $P$,then
deleted 56 characters in body
Apr
16
revised Factorial series with ratio test inconclusive
edited body
Apr
16
revised Factorial series with ratio test inconclusive
deleted 2 characters in body
Apr
16
revised Problem involving binomial coefficients where p+q=1
added 341 characters in body
Apr
11
revised How do I show that $\frac a{1 - a^2} + \frac b{1 - b^2} + \frac c{1 - c^2} \ge \frac {3 \sqrt 3}2$
added 31 characters in body
Apr
10
revised Multiplication of three primitive roots
added 10 characters in body
Apr
10
revised How do I show that $\frac a{1 - a^2} + \frac b{1 - b^2} + \frac c{1 - c^2} \ge \frac {3 \sqrt 3}2$
added 45 characters in body
Apr
3
revised Find last two digits of $33^{100} $
added 2 characters in body
Apr
2
revised Find last two digits of $33^{100} $
added 296 characters in body
Apr
2
revised Series sum - where is the error?
added 86 characters in body
Mar
30
revised Summation $\frac{3}{1^2}+\frac{5}{1^2+2^2}+\frac{7}{1^2+2^2+3^2}+…$
added 46 characters in body
Mar
29
revised Use an expression for $\frac{\sin(5\theta)}{\sin(\theta)}$ to find the roots of the equation $x^4-3x^2+1=0$ in trigonometric form
added 360 characters in body
Mar
27
revised Tricky Indefinite Integral
deleted 3 characters in body
Mar
27
revised Can you find a series whose sum is $… = (a) *\sqrt{\frac{1}{1-n}}$
added 40 characters in body
Mar
26
revised Evaluate $\int_{0}^{\frac{\pi}{2}} \frac{1}{4\cos^{2}x + 9\sin^{2}x} dx$
added 18 characters in body
Mar
25
revised Prove this integral problem
added 1 character in body
Mar
25
revised Prove: $\csc a +\cot a = \cot\frac{a}{2}$
added 114 characters in body