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[" प्रश्रनि4.सिद्ध कीजिए- "],[[cot^(-1)[...

[" प्रश्रनि4.सिद्ध कीजिए- "],[[cot^(-1)[(sqrt(1+sin x)+sqrt(1-sin x))/(sqrt(1+sin x)-sqrt(1-sin x))]]=(x)/(2)],[x in(0,(pi)/(4)).,[NCERT;CBSE2009,14]]

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