RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 5 of Exercise 4B

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Find the principal value of each of the following :

[Formula: cosec-1(-x) = -cosec-1(x) ]


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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