let ut 3t ft t2cos t sin t and gt 3t 2 sint cost cos2 t ca

let u(t) =3t, f(t) = (t^2,cos t, sin t), and g(t) = (3t, 2 sint cost, cos^2 t). calculate the following quantities.
1) (g ? (f

the symbol u mentioned means \"of\" that means f(g(x)) in the first question the question is not clear still by guessing what could be i am giving some answers f(u(x))=( 9t^2 , cos 3t , sin3t ) the rest is not clearly understood from the question ......if u could write it properly then answering would be easy