RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 5 of Exercise 4.7

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5

Evaluate each of the following:

The value of cosec is 2.


The question becomes cosec–1(2)


Let,


cosec–1(2) = y


cosec y = 2


cosec = 2


The range of principal value of cosec–1 is –{0} and


cosec = 2


Therefore, the value of cosec–1(cosec) is .


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