Inequality and Trigonometric Substitution
6777
Showing $(a^{2}+2)(b^{2}+2)(c^{2}+2)\geq 9(ab+bc+ca)$
28125
Showing that $1 - \frac{x^2}2\leq\cos x$, $\forall x \in \mathbb{R}$
105047
Prove the inequality $|xy|\leq\frac{1}{2}(x^2+y^2)$
131543
inequality with three variables and condition
77026
Proof with inequalities
129890
Proving inequality $|\sin(n\theta) |\le n\sin\theta$
84420
When is $\sin(x) = \cos(x)$?
20073
How to fill in inequality where all inequalities overlap
131475
Example of the equality of an inequality
156669
Trying to prove a simple (?) inequality
58969
A proof for the inequality $\sum_{i=0}^{t-2}{\frac{1}{t+3i}} \leq \frac{1}{2} $ for all $t \geq 2$
70448
Inequality for harmonic means
99820
symetric inequality for a rational function of three variables
135550
Inequality question­
30386
Showing the inequality $|\alpha + \beta|^p \leq 2^{p-1}(|\alpha|^p + |\beta|^p)$
118586
Confused About Trigonometric Substitution
15232
Proving an inequality involving real powers