If , then the sum of all possible values of…

MATHEMATICS · Single correct · CBSE · Mathematics · Inverse Trigonometric Functions · Inverse Trigonometric Functions

Problem

If

\cos^{-1}x=\sin^{-1}(3x)

, then the sum of all possible values of

x

equals: (a)

0

(b)

\frac{1}{\sqrt{10}}

(c)

\frac{2}{\sqrt{10}}

(d)

-\frac{2}{\sqrt{10}}

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