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If cos(x+y)=4/5, sin(x-y)=5/13 and x,y lie between 0 and pi/4, then find the value of tan2x.

Asked by adesh_singh 18th February 2011, 5:41 PM
Answered by Expert
Answer:
dear student,
let
x+y=A
x-y=B
2x= A+B
tan 2x
=
now put the values.
Answered by Expert 21st February 2011, 2:11 PM
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