Which of the following is/are true...

Which of the following is/are true

`2tan^(-1)x=sin^(-1)((2x)/(1+x^(2)))," when "abs(x) le 1`

`2sin^(-1)x=sin^(-1)[2xsqrt((1-x^(2)))]," when "(-1)/sqrt(2) lt x lt 1/sqrt(2)`

`2tan^(-1)x=sin^(-1)((2x)/(1+x^(2)))," when "x gt 1`

`2tan^(-1)x=sin^(-1)((2x)/(1+x^(2)))," when "x lt -1`

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The correct Answer is:

A, B

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Which of the following is a true peroxide

`NO_(2)`

`MnO_(2)`

`RbO_(2)`

`BaO_(2)`

`NO_(2)`

`MnO_(2)`

`RbO_(2)`

`BaO_(2)`

It provides opportunities for variations

It maintain uniform genetic purity of organisms for successive generations

It preserves genetic information for several generations

It permits multiplication of desired genes only