RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 30 of Very short answer

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30

Answer each of the following questions in one word or one sentence or as per exact requirement of the question:

Write the value of .


Given cos-1 (cos 2π/4)


We know that cos-1 (cos θ) = θ


= 2π/4


= π/2


cos-1 (cos 2π/4) = π/2


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