Minimum value of $\frac{2-\cos(x)}{\sin(x)}$ without differentiation
52311
Prove that $0 \le \frac{1+\cos\theta}{2+\sin\theta} \le \frac{4}{3}$ for all real $\theta$.
19056
Find the limit of $(2\sin x-\sin 2x)/(x-\sin x)$ as $x\to 0$ without L'Hôpital's rule
150734
Solving $\lim\limits_{x\to0} \frac{x - \sin(x)}{x^2}$ without L'Hospital's Rule.
8174
Using Newton's method calculate $ \frac{1}{\sqrt{a}} $ without division
155493
Minimum value of the expression given below.
127004
Extreme of $\cos A\cos B\cos C$ in a triangle without calculus.
69010
Is there a way to evaluate the derivative of $x$! without using Gamma function?
99795
Derivative of piece-wise function given by $x\sin\frac1x$ at $x=0$
708
Find the minimum of $(u-v)^2+ (\sqrt{2-u^2}-\frac{9}{v})^2$ for $00$.
24221
Complex numbers - minimum value proof
36099
Show that $\|f\|^{2}$ attains a minimum value on the interior of $B$
74409
Differentiaion Calculus: Trig Inverse Function.
53411
Minimum of $\sqrt{\frac{a}{b+c}}+\sqrt{\frac{b}{c+a}}+\sqrt{\frac{c}{a+b}}$
72278
What is the value of $\frac{\sin x}x$ at $x=0$?
28125
Showing that $1 - \frac{x^2}2\leq\cos x$, $\forall x \in \mathbb{R}$
76441
Max. and Min. value of $|z|$ in $\left|z+\frac{2}{z}\right| = 2\,$
36741
Anti-derivative of continuous function $\frac{1}{2+\sin x}$