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निम्नलिखित का उत्तर सत्य अथवा असत्य के र...

निम्नलिखित का उत्तर सत्य अथवा असत्य के रूप में दीजिए: `cos^(-1).(1-x^(2))/(1+x^(2))=2tan^(-1)x`.

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