cos(alfa+beta)=4/5 sin(alfa+beta=5/13 then tan2alfa=
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Are you sure the question is correct?
Cos^2x+sin^2x=1
But in this case if u take x as alpha+beta.
It doesn't satisfy the relation.
pranav23883:
cos(alfa+beta)=4/5 and sin(alfa-beta)=5/13 where 0<_=alfa and beta <=π/4 then tan2alfa=?
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