Question Number 133347 by rs4089 last updated on 21/Feb/21
$${for}\:{a}\:{triangle}\:{ABC}\:… \\ $$$${find}\:{minimum}\:{value}\:{of}\: \\ $$$${CosA}.{CosB}.{CosC} \\ $$
Commented by mr W last updated on 21/Feb/21
$${i}\:{think}\:{there}\:{is}\:{no}\:{minimum}, \\ $$$${minimum}\:\rightarrow−\mathrm{1} \\ $$