'Q2' IfA+B=45^{\circ} \text { then }(1+\tan A) \cdot(1+\tan B)=a) 0、 – InterviewSolution

1.	'Q2' IfA+B=45^{\circ} \text { then }(1+\tan A) \cdot(1+\tan B)=a) 0、, b) 1c) -2d) 2
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