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mrnovice
  • Member for 7 years, 3 months
  • Last seen more than a month ago
27 votes
Accepted

Why sum of interior angles in convex polygon is $(n-2)\cdot 180$

13 votes

Find $S = \frac{a}{b+c}+\frac{b}{c+a} + \frac{c}{a+b}$ if values of $a+b+c$ and $\frac1{a+b}+\frac1{b+c}+\frac1{a+c}$ are given

10 votes

Product of two consecutive integers.

7 votes

How do you integrate $\frac{\cos^5(x)}{\sin^5(x) + \cos^5(x)}$?

6 votes
Accepted

particular solution for 2nd order ODE

6 votes
Accepted

Using the substitution method for a simple integral

6 votes
Accepted

Find the angle from given information

6 votes

What operations can be performed on three variables $x$, $y$, and $z$ and produce one unique sum?

5 votes
Accepted

Trigonometric-substitutions for $\int \frac{x}{\sqrt{x^2+x+1}}\,dx$

5 votes
Accepted

How to compute : $\int \frac{dt}{(t-1)\sqrt{t^2+2t+3}}$?

5 votes

Can a triangle have 3 irrational angles that are not rational multiples of eachother

5 votes
Accepted

Is there a function to eliminate repetitive factors?

5 votes

Why does parenthesis before exponents not apply to squaring a binomial?

4 votes

Mathematical Olympiad Treasures Problem 1.11

4 votes
Accepted

Given $a = \log_{\sqrt{6}}{\sqrt[3]{4}}$ find $\log_{\sqrt{3}}{\sqrt[3]{2}}$

4 votes

Simple trigonometric proof required: $\sin(x)+\sin(3x) = 2\cos(x)\sin(2x)$

4 votes
Accepted

Find a quadratic integer polynomial that annihilates a given $2\times2$ integer matrix

4 votes
Accepted

How do I equate coefficients?

4 votes
Accepted

How Do You Find The Point Of Intersection Of $2$ Vectors?

4 votes

How to show that the inequality with exponents is true

4 votes
Accepted

Solve $\int{x \sqrt{x-1}} dx$ using u-sub

4 votes

What is $(-1)^{\sqrt{2}}$?

4 votes
Accepted

Value of $\tan^2(5)+\tan^2(10)+\tan^2(15)+...+\tan^2(85)$

4 votes

Why these conclusions from the definition? Absolute value

4 votes

Logarithm Properties

4 votes
Accepted

Math Competition Question

4 votes

How does $1/i =-1$ where $i$ is an imaginary number?

4 votes

Modular Arithmetic and Primes

3 votes

Possible outcomes on a three coin flip.

3 votes

How to find the Maclaurin series of $ \frac{7x}{1+2x}$

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