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2h
comment How to simplify following logarithmic expression with wxMaxima
See proofwiki.org/wiki/Laws_of_Logarithms
7h
comment Evaluate this limit of inverse trigonometric and radical functions without l'Hospital
@afsmi, $\lim_{u\to0}\dfrac{\arctan u}u=\lim_{y\to0}\dfrac y{\tan y}=1$
9h
comment Evaluate this limit of inverse trigonometric and radical functions without l'Hospital
@Tim, $$a^{1/3}=u, a=u^3, b^{1/3}=v$$ etc.
9h
comment To test convergence of improper integral $ \int_{0}^{\infty} \frac{x\log(x)}{(1+x^2)^2}\, \mathrm dx$
Try with $x=1/y$ or $x=\tan u$
10h
answered Evaluate this limit of inverse trigonometric and radical functions without l'Hospital
23h
answered Solving Trigonometric Equation.
23h
revised trigo substitution and identites?
added 49 characters in body
23h
answered trigo substitution and identites?
23h
answered integrate $\int \frac{(16-9x^2)^{\frac{3}{2}}}{x^6}dx$
23h
answered How to expand $x_1^3 + x_2^3$ with the parameters of quadratic equation
1d
comment Summation of series with binomial coefficients
@ThomasAndrews, Definitely. Thanks
1d
revised Summation of series with binomial coefficients
added 4 characters in body
1d
answered Summation of series with binomial coefficients
1d
comment Trigonometric Idntities under the condition $A+B+C=π$
@Iaamuseruser, $$4x=\pi-A$$ right $$4(x+y+z)=3\pi-(A+B+C)$$ and $A+B+C=\pi$
1d
comment Solving Trigonometric Equation.
Use mathworld.wolfram.com/ProsthaphaeresisFormulas.html correctly in the Right Hand Side
1d
comment Trigonometric Idntities under the condition $A+B+C=π$
@Iaamuseruser, Are you talking about $\sin2x+\sin2y,$ then see mathworld.wolfram.com/ProsthaphaeresisFormulas.html
1d
answered Trigonometric Idntities under the condition $A+B+C=π$
1d
comment How do I calculate $\sum_{k=1}^{33}\binom{33}{k} k$
$$k\binom nk=n\binom{n-1}{k-1}$$
1d
comment Evaluate $\sum_{n=1}^{\infty} \frac{n}{n^4+n^2+1}$
@Galc127, Difference of mind & finger. Thanks
1d
revised Evaluate $\sum_{n=1}^{\infty} \frac{n}{n^4+n^2+1}$
added 1 character in body