RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 2 of Exercise 4.7

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Evaluate each of the following:

As cos(–θ) is cos(θ )

(cos) = (cos)



The question becomes cos–1()

Let cos–1 =y

cos y =

= cos

The range of principal value of cos–1 is [0,π] and cos

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

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