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13h
answered What is the ten's digit of $7^{7^{7^{7^7}}}$
13h
answered Why does the complex equation $z=Ae^{it}+Be^{-it}$ represents an ellipse?
13h
revised Equation of normals at the end of variable chord of parabola $y^2-4y-2x=0$
added 129 characters in body
1d
answered How can I solve the simultaneous equations that arise in solving $\cos(z)=2$.
1d
comment Derivation of Ln root
@AlexR, Look at OP's comment
1d
comment Derivation of Ln root
For $4x-3>0,$ $$\ln(4x-3)^{1/2}=\dfrac{\ln(4x-3)}2$$
1d
revised Equation of normals at the end of variable chord of parabola $y^2-4y-2x=0$
added 8 characters in body
1d
revised Limit involving inverse tan function
added 10 characters in body
1d
comment Limit involving inverse tan function
@Travis, Yes, math.stackexchange.com/questions/304399/…. But as $x\to\infty, h\to0^+$
1d
answered Limit involving inverse tan function
1d
answered Equation of normals at the end of variable chord of parabola $y^2-4y-2x=0$
1d
answered Why is $\lim_{x\to e^+} (\ln x)^{1/(x-e)} =e^{1/e}$
1d
answered How to prove this trigonometry
2d
answered If $f(x) = \sin^4 x+\cos^2 x\;\forall x\; \in \mathbb{R}\;,$ Then $\bf{Max.}$ and $\bf{Min.}$ value of $f(x)$
2d
comment Prove $\sin(45^\circ) + \sin(15^\circ) = \sin(75^\circ)$
@user233631, mathworld.wolfram.com/ProsthaphaeresisFormulas.html
2d
answered Solve for $x:1 + \tan^2(x) = 8\sin^2(x)$
Apr
20
comment Differentiating the function $\arcsin(3x-4x^3)$
If $x>1/2, \arcsin(3x-4x^3)=-(3\arcsin x-\pi)$ and for $x<-1/2, \arcsin(3x-4x^3)=-\pi-3\arcsin x$
Apr
20
answered Differentiating the function $\arcsin(3x-4x^3)$
Apr
20
comment Simplify $(x_1+x_2+\dots+x_m)^p$?
mathworld.wolfram.com/MultinomialTheorem.html
Apr
20
answered Function represented by power series