Question

Tema : Ángulo Doble

Reducir : M = (secx - cosx ) ( cosecx - senx )

Answer 1

${(secx-cosx)(cscx-senx)=}\\\\{\left( \frac{1}{senx}-senx\right)\left(\frac{1}{cosx}-cosx\right)=}\\\\{\left(\frac{1-sen^2x}{senx}\right)\left(\frac{1-cos^2x}{cosx}\right)=}\\\\{\left(\frac{cos^2x}{senx}\right)\left(\frac{sen^2x}{cosx}\right)=}\\\\{(cosx)(senx)=}\\\\{senx.cosx=}\\\\{\boxed{\frac{sen(2x)}{2}}}\\\\{\text{salu2.!! :)}}$