Find the principal value of each of the following :
[ Formula: cos-1(-x) = -cos-1(x) ]
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4. Inverse Trigonometric Functions
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1 A
1 B
2
3 A
3 B
3 C
3 D
4 A
4 B
4 C
4 D
5 A
5 B
5 C
6 A
6 B
6 C
6 D
6 E
6 F
6 G
6 H
7 A
7 B
7 C
7 D
7 E
7 F
7 G
8 A
8 B
8 C
8 D
8 E
9 A
9 B
9 C
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