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1d
comment The residue of $x^{15}-1$ divided by $x^2-1$
$$x((x^2)^7-1^7)+x-1$$ Now use math.stackexchange.com/questions/188657/…
1d
comment Finding an angle $\theta$ in a complex number
@XMLParsing, What is $\tan(A+B)=?$ But, I think math.stackexchange.com/questions/984416/… solves your problem of finding $t$
1d
answered Solve $e^z + e^i = 0$
1d
answered Finding an angle $\theta$ in a complex number
1d
comment How to find the equation of lines passing through the origin and perpendicular to the lines $xy-3y^2+y-2x+10=0$
@user103828, If you follow the trail, the rectification was already there, but not in the first line
1d
comment Find the equations of the two circles which pass through the point $(2,0)$ and have both the $y$-axis and the line $y-1=0$ as tangents
@hohner,What is the formula of the distance of a given point from a given line?
1d
revised How to find the equation of lines passing through the origin and perpendicular to the lines $xy-3y^2+y-2x+10=0$
edited body
1d
answered Am I going about this wrong? Complex expression to polar form
1d
answered Find the equations of the two circles which pass through the point $(2,0)$ and have both the $y$-axis and the line $y-1=0$ as tangents
1d
comment Using induction for $x^n - 1$ is divisible by $x - 1$
math.stackexchange.com/questions/188657/…
1d
answered How to find the equation of lines passing through the origin and perpendicular to the lines $xy-3y^2+y-2x+10=0$
1d
comment Proof of a formula for generalized Fibonacci numbers
An identity may be useful: $$U_rU_{n-1}-U_{r-1}U_n=U_rU_{n-1}-U_{r-1}(U_{n-1}+U_{n-2})=U_{n-1}[U_r-U_{r-1}]‌​-U_{r-1}U_{n-2}$$ $$\implies U_rU_{n-1}-U_{r-1}U_n=-(U_{r-1}U_{n-2}-U_{r-2}U_{n-1})$$
1d
comment Find the co-ordinates of the point of intersection
Set $y=-1$ to find $x$
1d
comment De Moivre's Theorem for proving
answers.yahoo.com/question/index?qid=20091201092452AACP5VB
2d
comment Partial Fractions (3 Factors)
mathworld.wolfram.com/PartialFractionDecomposition.html
2d
comment Proof of $\arcsin x \le 2\arctan x$?
@daw, Choice of increasing function?
2d
comment Proof that $ y(n) = ∑_{k=-∞}^{∞}\ {a}^{-k}u(n-k)u(-k) = \frac{1}{1-a }$ if $n>0$
en.wikipedia.org/wiki/Geometric_progression#Derivation
2d
comment Inverse Trigonometric Integrals
For the indefinite integral, can you try with Integration By Parts to derive a Reduction formula
2d
comment How to determine roots of a complex polynomial
@learningmaths, math.stackexchange.com/questions/690033/…
2d
revised Proof of $\arcsin x \le 2\arctan x$?
added 448 characters in body