RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 4. Inverse Trigonometric Functions

Subject: Maths - Class 12th

Q. No. 3 of Exercise 4.8

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A. Let sin-1x = y

Where because “cos y” is +ve

sin y = x

where “x” is +ve as

As sin2y+cos2y = 1


According to the question,

Squaring both sides,

As x > 0

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