Dancer25 said:Any ideas on how to easily compute cos(12)cos(24)cos(48)cos(96)? I tried product to sum but it got messy
BigGlenntheHeavy said:\(\displaystyle was \ it \ obvious, \ perhaps \ so. \ Anyways, \ good \ show, \ I'll \ remember \ this \ one.\) ...Obvious??!! No - like almost all other trig-identities - I stumbled into it. And that is why I am afraid I won't remember it next time - just have to redo the stumbling around...\(\displaystyle With \ trig. \ identities, \ one \ can \ do \ wonders.\)
\(\displaystyle Note: \ It \ is \ Glenn, \ not \ Glen.\) ... Corrected