Explain with steps please

2a3 Find C-1 ( $2 + (2 ) 2 The function we wish to invert must be expressed in a form in which its inv form may be recognized. Thus, 2a3 C-1 a (s2 + a?) - a(s2 - a?) ( $ 2 + a 2 ) 2 ($2 4 02)2 a = C-1 $2 - a2 d S $2 + a2 a (82 + (2)2 = sin(at) - a Cl ds 52 + q2 - sin(at) - at cos(at)