Teaching EMRS PGT Mock Test 2023 Mathematics Trigonometry Inverse Trigonometric Functions

यदि \(\rm sin^{-1}\frac{3}{x}+sin^{-1}\frac{9}{x}=\frac \pi 2\) है, तो x का मान क्या है?

1
1
2
3√10 
3
0
4
√10
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