make it into A = B + (pi/4)
take tan on both sides, apply tan(A+B) identity
simplify and extract tanA
add tanA to both sides and then factorise
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Can you give answer of this question please.
ReplyDeleteif A-B=45
(1+tanA)(1+tanB)=2tanA
note that 45 degrees is the same as (pi/4) in radian measure
DeleteSo this is the same as the above question just change (pi/4) to 45 degrees and use tan(45 degrees) =1
Can you give the answer if A+B=45 then prove that (1+cotA) (1+cotB)= 2cotA.cotB
ReplyDelete