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Aug
24
answered Integer solutions of a quadratic equation with combined variables
Aug
24
answered solve non homogeneous recurrence relation with only '1' as root of its equation
Aug
24
answered Prove the trigonometric identity $\cos(x) + \sin(x)\tan(\frac{x}{2}) = 1$
Aug
24
answered If $\text{gcd}(a,561)=1$, then $a^{560}=1\mod 561$
Aug
24
comment Simplify $\tan3x/\tan x$. Answer given is $(2\sin 2x +1)/(2\sin 2x-1)$
@Prattusha, The answer supplied is incorrect. We just need to adapt correct method, the answer will follow
Aug
24
answered Simplify $\tan3x/\tan x$. Answer given is $(2\sin 2x +1)/(2\sin 2x-1)$
Aug
24
answered Trignometric Identities and Equations
Aug
24
answered Trignometric Identities and Equations
Aug
23
answered What will be the 100th term of the series:
Aug
23
comment Questions from an olympiad on number theory
The second is very interesting $$\sum\dfrac{F_r}{2^r}$$ where $F_r$ is the $r$ th Fibonacci number . We may use proofwiki.org/wiki/Euler-Binet_Formula
Aug
23
answered Infinite series of trigonometric ratios
Aug
23
comment Find the equation of the tangent to the parabola $ 4x^2=y$ which is parallel to the line $4x+y-3=0$
@N.F.Taussig, Thanks for your observation.
Aug
23
revised Find the equation of the tangent to the parabola $ 4x^2=y$ which is parallel to the line $4x+y-3=0$
added 56 characters in body
Aug
23
comment how to integrate $\dfrac{\cos x-\cos2x}{1-\cos x}$
@HenningMakholm, As $$\cos x-\cos^2x=\cos x(1-\cos x)$$ is evne simpler than the current one:)
Aug
23
revised how to integrate $\dfrac{\cos x-\cos2x}{1-\cos x}$
edited title
Aug
23
revised how to integrate $\dfrac{\cos x-\cos2x}{1-\cos x}$
added 32 characters in body
Aug
23
answered how to integrate $\dfrac{\cos x-\cos2x}{1-\cos x}$
Aug
23
comment how do you solve $(x^2-5x+5)^{x^2-36} =1$
Related : math.stackexchange.com/questions/1396086/… and math.stackexchange.com/questions/1398012/…
Aug
23
comment $2017^{2016^{2015}} \mod 1000$
@TonyK, Thanks for your observation
Aug
23
revised $2017^{2016^{2015}} \mod 1000$
added 103 characters in body