Book: RS Aggarwal - Mathematics
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 5 of Exercise 4B
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5
Find the principal value of each of the following :
[Formula: cosec-1(-x) = -cosec-1(x) ]
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This can also be solved as
Since cosec is negative in the third quadrant, the angle we are looking for will be in the third quadrant.
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