In a $ riangle A B C, 1- an \frac{B}{2} an \frac{C}{2}$ is equal to

Question

In a $	riangle A B C, 1-	an \frac{B}{2} 	an \frac{C}{2}$ is equal to

Professor PC Thomas Classes · Answer

Expanding half angle identities directly condenses boundaries verifying geometric perimeter simplifications.