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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5

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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