Posted by Don on .
Use reduction identities to determine if the following statement is true or false:
tan (AB) = tan (BA)
Is this starement True or False ?

Trig 
Reiny,
easiest way:
let Ø be AB, then BA = Ø
but we know tan (Ø) =  tanØ
so tan(AB) = tan(BA) is false
or
LS = (tanA  tanB)/(1 + tanAtanB)
RS = (tanBtanA)/(1+tanAtanB)
the LS is opposite the RS, not equal