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location Kolkata, India
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visits member for 2 years, 2 months
seen 36 mins ago

1d
revised If $\sin( 2 \theta) = \cos( 3)$ and $\theta \leq 90°$, find $\theta$
added 319 characters in body
1d
revised How to prove that $53^{103}+ 103^{53}$ is divisible by 39?
added 209 characters in body
Aug
24
revised If $ p^2=a^2 \cos^2 \theta+b^2 \sin^2 \theta $, show that $p + p'' = \frac{a^2b^2}{p^3}$
added 544 characters in body
Aug
23
revised Using sum/product of roots of a cubic equation to solve given expression $(a+b)^3+ (b+c)^3 + (c+a)^3$
added 52 characters in body
Aug
23
revised Using sum/product of roots of a cubic equation to solve given expression $(a+b)^3+ (b+c)^3 + (c+a)^3$
added 164 characters in body
Aug
22
revised Find the total number of real solutions
added 8 characters in body
Aug
22
revised If $\sin^2 \theta + 2\cos \theta – 2 = 0$, then find the value of $\cos^3 \theta + \sec^3 \theta$
added 283 characters in body
Aug
22
revised How to find the polynomial such that …
edited body
Aug
20
revised How prove this triangulation with indentity
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Aug
20
revised How solve this equation $\sin x\cdot \sin20=2\sin(110-x) (\sin10)^2$
deleted 335 characters in body
Aug
17
revised Equation of parabola with focus and tangent
added 105 characters in body
Aug
17
revised Sum of the series $\frac{2}{5\cdot10}+\frac{2\cdot6}{5\cdot10\cdot15}+\frac{2\cdot6\cdot10}{5\cdot10\cdot15\cdot20 }+\cdots$
deleted 25 characters in body
Aug
17
revised Sum of the series $\frac{2}{5\cdot10}+\frac{2\cdot6}{5\cdot10\cdot15}+\frac{2\cdot6\cdot10}{5\cdot10\cdot15\cdot20 }+\cdots$
added 273 characters in body
Aug
17
revised Proving that a number is non-negative?
edited body
Aug
17
revised Solve $5^{2x+2}-5^{x+2}+6=0 $
added 137 characters in body
Aug
16
revised Find partial sums of the series $12+105+1008+10011+\dots$
added 300 characters in body
Aug
16
revised Problem involving Basic Trigonometry
added 623 characters in body
Aug
16
revised probablity for a fair coin, clarifying on how to use binomial distribution formula
edited body
Aug
15
revised Mathematical way to solve integer numbers $217 = (20x+3)r+x$
added 13 characters in body
Aug
15
revised Mathematical way to solve integer numbers $217 = (20x+3)r+x$
added 131 characters in body