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11h
comment Differentiating the function $\arcsin(3x-4x^3)$
If $x>1/2, \arcsin(3x-4x^3)=-(3\arcsin x-\pi)$ and for $x<-1/2, \arcsin(3x-4x^3)=-\pi-3\arcsin x$
11h
answered Differentiating the function $\arcsin(3x-4x^3)$
13h
comment Expand $(x_1+x_2+\dots+x_m)^n$?
mathworld.wolfram.com/MultinomialTheorem.html
13h
answered Function represented by power series
1d
comment $\cot^{-1}(x)=\pi+\tan^{-1}(1/x)$ when $x<0$
See math.stackexchange.com/questions/304399/… and math.stackexchange.com/questions/610261/…
1d
answered Simple trigonometrical equations
1d
comment Is $a \sin x + b \sin y \leq \sin(ax + by)$ true?
See math.stackexchange.com/questions/128888/…
1d
comment Simplify $ \csc(65^{\circ} + \theta) - \sec(25^{\circ} - \theta) - \tan(55^{\circ} - \theta) + \cot(35^{\circ} + \theta) $.
@Abhishekstudent, See proofwiki.org/wiki/…
1d
answered How to show this integral (Error function)
1d
comment Simplify $ \csc(65^{\circ} + \theta) - \sec(25^{\circ} - \theta) - \tan(55^{\circ} - \theta) + \cot(35^{\circ} + \theta) $.
@Abhishekstudentm $$65^\circ+\theta+(25^\circ-\theta)=90^\circ\iff65^\circ+\theta=90^\circ-(25 ^\circ-\theta)$$
1d
answered Simplify $ \csc(65^{\circ} + \theta) - \sec(25^{\circ} - \theta) - \tan(55^{\circ} - \theta) + \cot(35^{\circ} + \theta) $.
2d
answered Functions - Trig - Determine
2d
comment limit evaluation calculus I
See math.stackexchange.com/questions/1205475/…
2d
comment Proving a complicated identity
@Unknown,In case you don't know Double Angle Formula, see the alternative method
2d
comment Proving a complicated identity
@ClaudeLeibovici, Thanks. I'm an Introvert:)
2d
revised Proving a complicated identity
added 152 characters in body
2d
answered Proving a complicated identity
2d
answered Which points lie on the prependicular bisector of (-1,-6) and (5,-8)
2d
answered Q: Why is this the limit?
2d
answered Combined arithmetic and geometric progression problem