#### Answer

For the function $cos^4(x)$:
Inner Function: $cos(x)$
Outer Function: $u^4$

#### Work Step by Step

With $y=f(u)$ and $u=g(x)$ to express $f(g(x))$, we can set $y=u^4$ and $u=cos(x)$ to get $cos^4(x)$

Published by
Pearson

ISBN 10:
0321947347

ISBN 13:
978-0-32194-734-5

For the function $cos^4(x)$:
Inner Function: $cos(x)$
Outer Function: $u^4$

With $y=f(u)$ and $u=g(x)$ to express $f(g(x))$, we can set $y=u^4$ and $u=cos(x)$ to get $cos^4(x)$

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