यदि \( A+B=45^{\circ} \), तो \( (1+\tan A)(1+\tan B) \) का मान है- (A) 2 (B) \( -2 \) (C) 1 (D) 0

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यदि \( A+B=45^{\circ} \), तो \( (1+\tan A)(1+\tan B) \) का मान है-
(A) 2
(B) \( -2 \)
(C) 1
(D) 0
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