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Janjan
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3 votes
0 answers
221 views

1 - Combinatorics - High School Level Olympiad Problem

3 votes
5 answers
333 views

Given $x, y$ are acute angles such that $\sin y= 3\cos(x+y)\sin x$. Find the maximum value of $\tan y$. [duplicate]

3 votes
2 answers
318 views

From $1$ to $50$, take a pair of integers so that their sum is greater than $50$

1 vote
4 answers
138 views

Positive integer $x$ such that $\sqrt{144+x^2}$is an integer

1 vote
2 answers
1k views

Number of solution set such that $a \geq b \geq c \geq d \geq 0$; $a, b, c, d \in \mathbb{Z}$ and $a + b + c + d = 10$ [closed]

1 vote
3 answers
656 views

Factoring High School Level Olympiad Problem

1 vote
5 answers
76 views

Possible values of $x+y+z$

0 votes
1 answer
29 views

Epsilon Delta Proof of Rational Functions [closed]

0 votes
1 answer
94 views

Combinatorics - 6 girls arranged in 2 rows ( each row contains at least 1 girl)

0 votes
3 answers
4k views

Finding minimum value of a square root function

-1 votes
2 answers
51 views

Continuity at an Interval?

-2 votes
4 answers
385 views

Given $\cos A$ and $\cos B$ , find $\cos C$ [closed]

-3 votes
1 answer
558 views

Trigonometry Olympiad Question [closed]