A.\(24\pi \,\,\,\left( {c{m^2}} \right)\)
B.\(12\pi \,\,\,\left( {c{m^2}} \right)\)
C.\(18\pi \,\,\,\left( {c{m^2}} \right)\)
D.\(32\pi \,\,\,\left( {c{m^2}} \right)\)

A.\(\dfrac{{\sqrt 5 }}{5}\)
B.\(\dfrac{{4\sqrt 5 }}{5}\)
C.\(\dfrac{4}{5}\)
D.\(\dfrac{{16}}{{25}}\)

A.\(P = \dfrac{{91}}{{125}}\)
B.\(P = \dfrac{{49}}{{25}}\)
C.\(P = \dfrac{7}{5}\)
D.\(P = \dfrac{1}{9}\)

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

A.\( - 1\)
B.\(\dfrac{7}{9}\)
C.\(\dfrac{9}{7}\)
D.\(1\)

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

A.\( - 10\)
B.\(2\)
C.\(1\)
D.\(\dfrac{1}{4}\)

A.\(P = \dfrac{9}{{16}}\)
B.\(P = \dfrac{9}{{32}}\)  
C.\(P = \dfrac{9}{8}\)
D.\(P = \dfrac{1}{8}\)

A.\(\left| {\dfrac{{\sin 2\alpha }}{{2m}}} \right| = 2\left| m \right|\sqrt {1 - {m^2}} \)
B.\(\left| {\dfrac{{\sin 2\alpha }}{{2m}}} \right| = 2\sqrt {1 - {m^2}} \)
C.\(\left| {\dfrac{{\sin 2\alpha }}{{2m}}} \right| = \sqrt {1 - {m^2}} \)
D.\(\left| {\dfrac{{\sin 2\alpha }}{{2m}}} \right| = 2\left| m \right|\left| {1 - {m^2}} \right|\)

A.\(1\)
B.\( - \dfrac{{10}}{{11}}\)
C.\(\dfrac{5}{{12}}\)
D.\( - \dfrac{8}{{11}}\)