RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 1 of Exercise 4.1

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Find the principal value of each of the following:


cos y =

We need to find the value of y.

We know that the value of cos is negative for the second quadrant and hence the value lies in [0, π].

cos y = – cos

cos y =

y =

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