1i dont understand what is the requirement of A
If tan A=1/7 and sin B=1/√10 where 0<A ,B<pi/2 then 2B equals??
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13 Answers
11but nix wat is the type of answer u want
it would be better to provide the options
and explain the use of tanA
1den i guess..sine inverse into 2..altho y mr.A is hangin about beats me..
1hehhe i dont kno whether it's jhakaas 4 d question, or jackass 4 ma answer....
11nix this is not that tough [1]
just solve it
PROCEDURE : make a triangleu will find that tanB=1/3
so
2B=2tan-11/3
and u get A = tan-11/7
now u have to check the answer 4m the options as the question is dependent on it
(a)2tan-11/3 + tan-11/7=pi/4
2tan-11/3=tan-13/4
tan-125/28 =pi/4
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25/28
pi/4 =pi/4
so A satisfies and A is the answer[1]