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" 24.If tim "(pi-A)/(4)+tan^(2)(pi-B)/(4...

" 24.If tim "(pi-A)/(4)+tan^(2)(pi-B)/(4)+tan^(2)(pi-C)/(4)=1," then "/_ABC" is "

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(1-tan^2(pi/4))/(1+tan^2(pi/4))=?