Choose the correct options for the following questions.
What is the value of $\cos(\cos^{-1}2)$=
Difficulty: Easy
A:
$\sqrt{2}$
B:
1/2
C:
Undefine
D:
0
The value of $\cos(\cos^{-1}\frac{1}{2})$ is
Difficulty: Easy
A:
1/2
B:
$\frac{\sqrt{3}}{2}$
C:
-1/2
D:
$\frac{1}{\sqrt{2}}$
The exact degree value of the function $\sin^{-1}(\frac{-\sqrt{3}}{2})$ is
Difficulty: Easy
A:
$70^{\circ}$
B:
$50^{\circ}$
C:
$90^{\circ}$
D:
$60^{\circ}$
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