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" .क.7.सिद्ध Do that "2tan^(-1)(1)/(2)=t...

" .क.7.सिद्ध Do that "2tan^(-1)(1)/(2)=tan^(-1)(4)/(3)

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Prove that 2tan^(-1)((1)/(2))=tan^(-1)((4)/(3))

2 tan ^(-1) ""(1)/(2) = tan^(-1) ""(4) /(3)

2Tan^(-1)(1)/(3)+tan^(-1)((1)/(7))=

2tan^(-1)(1/2)-tan^(-1)(1/7)=(pi)/(4)

Prove that 2 tan^(-1) ((3)/(4)) = tan^(-1) ((24)/(7))

tan^(-1)3-tan^(-1)2=tan^(-1)(1/7)

tan^(-1)3-tan^(-1)2=tan^(-1)(1/7)

prove that 2(tan^(-1)1)/(3)+(tan^(-1)1)/(7)=(pi)/(4)

Show that: cos(2tan^(-1)(1/7))=sin(4tan^(-1)(1/3))