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यदि A व B न्यूनकोण है तथा tan A =1/2, ta...

यदि A व B न्यूनकोण है तथा `tan A =1/2, tanB=1/3` व `tan (A+B)=(tanA+tan B)/(1-tanA tanB)'` तब सिद्ध कीजिए कि `A+B=45^(@)`

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