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Apr
10
answered What is the sum of this series involving factorial in denominator?
Apr
10
comment Solve limit $\lim _{x\to \infty } \left(\frac{5-x^3}{1-x^3}\right)^{2x^2+1}$.
See math.stackexchange.com/questions/1203005/… and math.stackexchange.com/questions/1061142/…
Apr
10
answered Simplifying an inverse trigonometric function
Apr
10
answered Given $\log 2$ and $\log 3$, compute $\log 120$
Apr
10
comment Where does this equation come from: $ (1+mx)^n = 1 + \sum_{n=1}^{\infty} {\binom{2n}{n} \over 4^n } x^n $
@Imago, Welcome. Also have a look into the link my comment in the question
Apr
10
revised Where does this equation come from: $ (1+mx)^n = 1 + \sum_{n=1}^{\infty} {\binom{2n}{n} \over 4^n } x^n $
added 4 characters in body
Apr
10
comment Where does this equation come from: $ (1+mx)^n = 1 + \sum_{n=1}^{\infty} {\binom{2n}{n} \over 4^n } x^n $
@LeonhardtvonM, Thanks, I was trying to find the mistake
Apr
10
answered Where does this equation come from: $ (1+mx)^n = 1 + \sum_{n=1}^{\infty} {\binom{2n}{n} \over 4^n } x^n $
Apr
10
comment Where does this equation come from: $ (1+mx)^n = 1 + \sum_{n=1}^{\infty} {\binom{2n}{n} \over 4^n } x^n $
See math.stackexchange.com/questions/746388/…
Apr
10
comment Compute $\lim_{x\rightarrow0}\frac{e^{x^2} - \cos x}{\sin^2 x}$
@Jean-ClaudeArbaut, As $1-\cos x\ne0$ it can be cancelled safely
Apr
10
comment Compute $\lim_{x\rightarrow0}\frac{e^{x^2} - \cos x}{\sin^2 x}$
@Jean-ClaudeArbaut, Please revert the wrong rectification
Apr
10
answered Compute $\lim_{x\rightarrow0}\frac{e^{x^2} - \cos x}{\sin^2 x}$
Apr
10
comment If $(58)^a=(5.8)^b=10^c$, then what is the relation between $a,b,c$?
@HemantaPaul, Have you noticed "Else"
Apr
9
answered What is $\tan \alpha$ if $\sin \alpha + \cos \alpha = \frac{\sqrt{3}-1}{2}$ and $\alpha \in (90^\circ,135^\circ)$
Apr
9
answered Computing $\int^{2}_{1}x^x \ln x \,dx$ in terms of $\int^{2}_{1}x^x dx$
Apr
9
answered If $(58)^a=(5.8)^b=10^c$, then what is the relation between $a,b,c$?
Apr
9
comment What is $\tan \alpha$ if $\sin \alpha + \cos \alpha = \frac{\sqrt{3}-1}{2}$ and $\alpha \in (90^\circ,135^\circ)$
This is called en.wikipedia.org/wiki/Tangent_half-angle_substitution
Apr
9
revised Summation of $\frac {n^a}{n!}$
added 124 characters in body
Apr
9
answered Summation of $\frac {n^a}{n!}$
Apr
9
revised What is $\tan \alpha$ if $\sin \alpha + \cos \alpha = \frac{\sqrt{3}-1}{2}$ and $\alpha \in (90^\circ,135^\circ)$
added 306 characters in body