If tanA=2/5 and A+B=90° then what is the value of cot b
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tan(A+B) =tan 90
tanA+ tan b / 1-tana.tanb = 1/0
= 1- tanA.tanB = 0
1= 2/5 tan B
tanB= 5/2
cot b = 2/5
tanA+ tan b / 1-tana.tanb = 1/0
= 1- tanA.tanB = 0
1= 2/5 tan B
tanB= 5/2
cot b = 2/5
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