Question

Solution of L{cosh^2 (2t)}​

Answer 1

Answer:

You can do it as follows:

1- Take @Ilya's suggestion to write cosh(3t) as:

(12exp(3t)+12exp(−3t))2=14exp(6t)+12+14exp(−6t)

Or

2- Use the fact that:

cosh2(3t)=1+cosh(6t)2