Question

prove that ( cosh2x-1)/2 = sinhx​

Answer 1

Step-by-step explanation:

( cosh2x-1/2) =(e^x + e^-x/2)² - ( e^x - e^-x/2)²

=e^2x+ 2 + e^-2x -e ^2x+2 -e^-2x/4

=4/4

=1