f ( 30 ) = sin ( 30 ) {\displaystyle f(30)=\sin(30)} g ( 30 ) = cos ( 30 ) {\displaystyle g(30)=\cos(30)} h ( x ) = 2 x {\displaystyle h(x)=2x} p ( x ) = x 2 {\displaystyle p(x)={\frac {x}{2}}}
1 2 {\displaystyle {\frac {1}{2}}} + 3 2 {\displaystyle {\frac {\sqrt {3}}{2}}} = 1 + 3 2 {\displaystyle {\frac {1+{\sqrt {3}}}{2}}}
( h ∘ p ) ( 30 ∘ ) = h ( p ( 30 ∘ ) = h ( 30 ∘ 2 ) = h ( 15 ∘ ) = 2 ⋅ 15 ∘ = 30 ∘ {\displaystyle (h\circ p)(30^{\circ })=h(p(30^{\circ })=h\left({\frac {30^{\circ }}{2}}\right)=h(15^{\circ })=2\cdot 15^{\circ }=30^{\circ }}
