(a). 3
(b). 5
(c).7
(d).9
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3
option b is correct........
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aryanrockz64oyb3yj:
Can u explain 2nd step ...why a+b=45°
look at the terms .first and second last,,, first contains tan1 and second last contains tan44..so 1+44=45...and it is prop. if a+b=45 then (1+tana)(1+tanb)=2
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0
Option b is the correct answer.
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