tan-1(\(2x\over 1-x^2\)) యొక్క అవకలన గుణకం sin-1(\(2x\over 1+x^2\)) దృష్ట్యా సమానం

1
\(2(1+x^2)\over 1-x^2\)
2
\(2(1-x^2)\over 1+x^2\)
3
0
4
1

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