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Trey Anupong's user avatar
Trey Anupong's user avatar
Trey Anupong's user avatar
Trey Anupong
  • Member for 5 years, 4 months
  • Last seen more than 4 years ago
3 votes
2 answers
1k views

Find maximum and minimum of $\sin x + \sin y$

3 votes
4 answers
182 views

$|x^2-3x+2|=mx$ with 4 distinct real solutions, find range of $m$ [closed]

3 votes
3 answers
161 views

$\sqrt{2} x^2 - \sqrt{3} x +k=0$ with solutions $\sin\theta$ and $\cos\theta$, find k

3 votes
3 answers
81 views

If $a_n=\left[\frac{n^2+8n+10}{n+9}\right]$, find $ \sum_{n=1}^{30} a_n$

2 votes
4 answers
278 views

$(x^3 + \frac{a}{x^2})^5 = -270$, find $a$

2 votes
0 answers
49 views

Express a set of number with binomial coefficients in terms of $n$ [duplicate]

2 votes
4 answers
136 views

Find remainder of division of $x^3$ by $x^2-x+1$ [duplicate]

2 votes
1 answer
150 views

$p=n^2-18n+77$: If $p>0$ and $p$ is prime, find $p$

2 votes
2 answers
724 views

If $\log(ax)\log(bx) +1=0$ has a solution $x>0$, then find bounds on $b/a$

1 vote
5 answers
405 views

Given $\cos (\theta)$ and $\sin (\theta)$, find $2\theta$

1 vote
3 answers
822 views

Find the number of routes from leftmost vertex to rightmost vertex

1 vote
4 answers
319 views

Calculate local maximum and minimum of $f(x)=(2+\sin x)(5-\sin x)$

0 votes
1 answer
56 views

Expressing the inner product $\vec{a}\cdot\vec{b}$ in terms of the inner product $\vec{a}\cdot\vec{c}$

0 votes
2 answers
51 views

Find $x$-coordinate of $Q$ from intersection of curve $y=ax^3$ and its tangent line

0 votes
1 answer
36 views

Find $a,b$ and $c$ from $\lim \limits_{x \to 0} \frac{a-x^2-(b-x^2)^2}{f_n(x)}=c$

0 votes
1 answer
366 views

Find area of cross section of cylinder by the plane $x$

0 votes
6 answers
453 views

$\omega$ is a solution of $x^2+x+1=0$, find $\omega^{10}+\omega^5+3$ [duplicate]

0 votes
3 answers
772 views

Find the radius of circle which touches parabola and $x$-axis

0 votes
0 answers
57 views

Given area of three points on a plane and $P$ is a point inside a triangle, find $\vec{OP}$