Question

). For any xeR show that cosh2x=2cosh2x-1​

Answer 1

Answer:

Step-by-step explanation:

cos 2x = cos (x+x)

= cos x * cos x - sin x*sin x

= cos^2 x - sin^2 x

= cos^2 x -(1 - cos^2 x)

= 2cos^2 x -1