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सिध्द कीजिए कि: tan (45^(@) + (A)/(2)) ...

सिध्द कीजिए कि: ` tan (45^(@) + (A)/(2)) = (cos A)/(1-sinA)`

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Prove that: i) tan(45^(@)-A/2) = (1-sinA)/(cosA) ii) tan(45^(@)+A/2)= (cosA)/(1-sinA)

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

( 1-tan ^(2) 45^(@) )/( 1+tan ^(2) 45^(@)) =

( 1-tan ^(2) 45^(@) )/( 1+tan ^(2) 45^(@)) =

( 1-tan ^(2) 45^(@) )/( 1+tan ^(2) 45^(@)) =

(cos A) / (1 + -sin A) = tan (45 ^ (@) + - (A) / (2))