Teaching EMRS PGT Mock Test 2023 Mathematics Trigonometry Trigonometric Functions

sin (tan-1 x), where |x| < 1, is equal to :

1
\(\frac{x}{{\sqrt {1 - {x^2}} }}\)
2
\(\frac{1}{{\sqrt {1 - {x^2}} }}\)
3
\(\)\(\frac{1}{{\sqrt {1 + {x^2}} }}\)
4
\(\frac{x}{{\sqrt {1 + {x^2}} }}\)
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