What is the fundamental period of cos(4t) + sin(6t)?
94273
Principal period of $\sin\frac{3x}{4}+\cos\frac{2x}{5}$
145463
How to factorise $2 \sin^2θ – 3\sinθ +1 = 0$
84420
When is $\sin(x) = \cos(x)$?
58874
Time period of a pendulum when a constant horizontal force acts
66704
Period $T$ of oscillation with cubic force function
46665
Solving $\cos x+\sin x-1=0$
62522
Sine is algebraically less than cosine in given interval.
90226
Proving trigonometric equation $\cos(36^\circ) - \cos(72^\circ) = 1/2$
100777
Finding the derivatives of sin(x) and cos(x)
100907
$\sin\alpha + \sin\beta + \sin\gamma = 4\cos{\frac{\alpha}{2}}\cos{\frac{\beta}{2}}\cos{\frac{\gamma}{2}}$ when $\alpha + \beta + \gamma = \pi$
11963
Period of a pendulum
617
Find θ: $β=\arctan\frac{(R+r)·\sin(θ)-r·\sin(θ(1+\frac{R}{r}))}{(R+r)·\cos(θ)-r·\cos(θ(1+\frac{R}{r}))}$
16712
Evaluate $\int_{-\pi/4}^{\pi/4}(\cos(t)+\sqrt{1+t^2}\cos(t)^3\sin (t)^3)dt$
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
83692
Finding the interval where a solution is certain to exist for the equation $y' + (\tan t)y = \sin t$
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
77978
Show that $\frac {\sin x} {\cos 3x} + \frac {\sin 3x} {\cos 9x} + \frac {\sin 9x} {\cos 27x} = \frac 12 (\tan 27x - \tan x)$