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If A+B =45^@, then the value of 2(1+ tan...

If `A+B =45^@`, then the value of 2(1+ tanA)(1+ tanB) is:
यदि `A+B =45^@` है, तो 2(1+ tanA)(1+ tanB) का मान होगा :

A

2

B

4

C

1

D

0

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