Period of $f(x)=\sin(4x)+\cos(x\sqrt{2})$
91744
Proving sum of sines is periodic when ratio of their frequencies is rational using differentation
35529
Prove that $\sin x+2x\ge\frac{3x(x+1)}{\pi}$ for all $x\in [0,\frac{\pi}{2}]$
99328
Value of $\sin (2^\circ)\cdot \sin (4^\circ)\cdot \sin (6^\circ)\cdots \sin (90^\circ) $
2300
Determine the remainder when $f(x) = 3x^5 - 5x^2 + 4x + 1$ is divided by $(x-1)(x+2)$
4178
Solve $f(x)f(2x^2) = f(2x^3+x)$
50247
Compute the period of a decimal number a priori
21780
Period of the sum/product of two functions
141522
$f$ is T periodic and $f(x) + f'(x) \ge 0 \Rightarrow f(x) \ge 0$
26562
Inverse of $f(x)=\sin(x)+x$
152701
A question on periodicity of complex functions
103285
Limit of a periodic function
158230
prove that a non constant periodic, continuous function has a "smallest period"
120569
Trigonometric Functions And Identities Question .
26096
Evaluating $\int \frac{\sin{x}+\cos{x}}{\sin^4{x}+\cos^4{x}} \mathrm dx$
22106
Prove that time for planet to fall into the Sun equals $\left( \frac { 1 }{ 4\sqrt { 2 } } \right)$ of the planet's period
87934
Deducing $\sin x + \cos x \ge 1$ from $(\sin x + \cos x)^2 = 1 + 2 \sin x \cos x$
85750
If $f(x)=\int_{x-1}^x f(s)ds$, is $f$ constant? Periodic?