A.\(F\left( x \right) = 2\sin \dfrac{x}{2}\)
B.\(F\left( x \right) =  - \sin \dfrac{x}{2}\)
C.\(F\left( x \right) = \sin \dfrac{x}{2}\)
D.\(F\left( x \right) =  - 2\sin \dfrac{x}{2}\)

A.\(3\)
B.\( - 3\)
C.\(5\)
D.\( - 5\)

A.\(8{a^3}\)
B.\(\dfrac{{2{a^3}}}{3}\)
C.\(\dfrac{{8{a^3}}}{3}\)
D.\(\dfrac{{\sqrt 2 {a^3}}}{3}\)

A.\( - 2\)
B.\(\dfrac{1}{2}\)
C.\(\dfrac{5}{2}\)
D.\(\dfrac{{ - 3}}{2}\)

A.\(8\)
B.\(10\)
C.\(9\)
D.\(12\)

A.\(S = \dfrac{1}{4}\left( {{e^2} + 1} \right)\)
B.\(S = \dfrac{1}{4}\left( {{e^2} - 1} \right)\)
C.\(S = \dfrac{1}{2}\left( {{e^2} - 1} \right)\)
D.\(S = \left( {{e^2} - 1} \right)\)

A.\(S = 16\pi {a^2}\)
B.\(S = 20\pi {a^2}\)
C.\(S = 24\pi {a^2}\)
D.\(S = 12\pi {a^2}\)

A.\(3\)
B.\(\sqrt {10} \)
C.\(\sqrt 2 \)
D.\(\sqrt 5 \)

A.\(\dfrac{{a\sqrt 3 }}{2}\)
B.\(a\sqrt 3 \)
C.\(\dfrac{{a\sqrt 2 }}{2}\)
D.\(\dfrac{{a\sqrt 5 }}{2}\)

A.\(6\)
B.\(4\sqrt 3 \)
C.\(2\sqrt {13} \)
D.\(3\sqrt 5 \)