RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 32 of Very short answer

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32

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

Evaluate: .


Given sin-1 (sin 3π/5)


We know that sin-1 (sin θ) = π – θ, if θ [π/2, 3π/2]


= π – 3π/5


= 2π/5


sin-1 (sin 3π/5) = 2π/5


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