calculs 3

Note: please write down the Answer by hand on paper and also write each answer with the number of the questions

Solve the following problems. Show all your work for full or partial credit. (1) Is it true that {(et - e-t) 2} = 352 - 4 ? S( $2 - 4) S cos 2t + sin 2t - e-2t (2) Find the following -1 ($2 + 4 ) ( 8 + 2 ) J Is your answer . U 4