A-Level Student's user avatar
A-Level Student's user avatar
A-Level Student's user avatar
A-Level Student
  • Member for 2 years, 6 months
  • Last seen more than a month ago
  • United Kingdom
7 votes
Accepted

How to calculate this trigonometric sum

7 votes
Accepted

Infinite sum - alternatives to residue theorem?

5 votes

Differentiating $x^{x^{x^{...}}}$

5 votes
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How to solve the linear congruence $ 25x -4 \equiv 9x +4 \pmod 8$?

5 votes

Evaluate $\int_{0}^{1} \frac{\ln(1 + x + x^2 + \ldots + x^n)}{x}\mathrm d x$

5 votes

How to find top and bottom function for finding area between two curves?

5 votes

Why is the area of a rectangle the height multiplied by the width?

5 votes

Does the sine rule ever give you the obtuse angle?

4 votes
Accepted

Finding real $(x,y)$ solutions that satisfies a system of equation.

4 votes

Solving $\sqrt{q-2} + \sqrt{q-5} = \sqrt{q+3}$

4 votes
Accepted

The logarithmic form of $\text{arcsin}(x)$ and its implications

4 votes
Accepted

Find the values of $\sinh 2x$ and $\cosh 2x$, if $\sinh 3x = 3/4$

3 votes

What is wrong with my derivation of the general formula of the power series for $\cos^{2}(x)$

3 votes

Find $\lim_{n\to\infty} \frac{n^{1296}}{6^n}$

3 votes
Accepted

Prove that $(x+1)^x \over x^x $ $=e$ as $x$ approaches infinity.

3 votes
Accepted

Prove this formula $\frac{1-r\cos(x)}{1-2r\cos(x)+r^2}= 1+\sum_{n=1}^{+\infty}r^{n}\cos\left(nx\right)$

3 votes

I can't solve this integral ( $\int 3\sec^4(3x)\;dx$ ). Is there something wrong with the problem?

3 votes
Accepted

Questions about Trigonometry

3 votes
Accepted

Help on how to proceed on this trig integral

3 votes
Accepted

Help finding an explicit solution to this ODE

3 votes
Accepted

U-sub without changing the bounds of integration

3 votes
Accepted

Polynomial Graph Question Whose Solution Does Not Make Sense

3 votes
Accepted

Don't know how to solve limits that have tan(x) as a power.

3 votes

Finding sum of the roots of $(\sin x+\cos x)^{(1+\sin 2x)}=2$

2 votes

Showing without calculating the integral that: $\pi/2 \leq \int_{0}^{\pi} \frac{x\sin(x)}{1+\cos(x)^2} \leq \pi$

2 votes
Accepted

How to factorise $x^2 + 1$

2 votes
Accepted

How do I evaluate $\sum_{n=1}^{\infty}\frac{n}{2n-1} - \frac{n+2}{2n+3}$?

2 votes
Accepted

How to find the second time when a piezoelectric crystal vibrates given a cubic trigonometric equation?

2 votes
Accepted

Weierstrass substitution on an algebraic expression

2 votes

Finding all pairs $(m,n)$ of positive integers such that $m(n + 1) + n(m − 1) = 2013$

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