Solution of the equation $x=\cos(x)$
48549
How to compute Dottie number accurately?
153942
Solution of functional equation $f(x+y)=f(x)+f(y)+y\sqrt{f(x)}$
138575
Proof that $\cos^2(x)\cosh^2(y) + \sin^2(x)\sinh^2(y) = -1 + \sin^2(x) - \sinh^2(y)$
82321
Is $\cos(x) \geq 1 - \frac{x^2}{2}$ for all $x$ in $R$?
105774
How is $ \cos (\alpha / \beta) $ expressed in terms of $\cos \alpha $ and $ \cos \beta $?
87304
Solving for $x$ : $a^x+b^x=c$
71465
solution of $y' = \exp \left(-\frac yx\right) + \frac yx$
19074
Solution to matrix equation PX=YP
61533
Solution af a system of 2 quadratic equations
123392
How does $cos(x) = \frac{\vec{v} \cdot \vec{w}}{|\vec{v}| \cdot |\vec{w}|}$ make sense?
109706
Fast way to come up with solutions to $x(x-1)(x-2)(x-3)=1$?
115128
How do I show this $\cos^2(\arctan(x))=\frac{1}{1+x^2}$
61591
Solve simple trig equation
106308
how do you solve $x^x=x$
29604
How to solve $\sin x +\cos x = 1$?
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
38849
Solve $x^y \, = \, y^x$