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