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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3

Solve:

A. Let sin-1x = y


Where because “cos y” is +ve


sin y = x


where “x” is +ve as


As sin2y+cos2y = 1


where



According to the question,




Squaring both sides,




As x > 0



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