Teaching EMRS PGT Mock Test 2023 Mathematics Trigonometry Inverse Trigonometric Functions

The function \(f(x) = \sqrt {\cos (\sin x)} + {\sin ^{ - 1}}\left( {\frac{{1 + {x^2}}}{{2x}}} \right)\) is defined for

1
x ∈ {-1, 1}
2
x ∈ [-1, 1]
3
x ∈ R
4
x ∈ (-1, 1)
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