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Mathematics
Mathematics
Problem
If
cos
−
1
x
=
sin
−
1
3
x
\cos^{-1} x = \sin^{-1} 3x
cos
−
1
x
=
sin
−
1
3
x
, then sum of all possible value of
x
x
x
equals (a) 0 (b)
1
10
\frac{1}{\sqrt{10}}
10
1
(c)
2
10
\frac{2}{\sqrt{10}}
10
2
(d)
−
2
10
\frac{-2}{\sqrt{10}}
10
−
2
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