Question

If tan  = 12/13 , evaluate (2 sinθ .cosθ)/(〖cos〗^2 θ - 〖sin〗^2 θ)

Answer 1

Answer:

this is the answer for above question

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Answer 2

Answer:

cos2x−sin2x2sinxcosx

⇒cos2xsin2x=tan2x

tan2x=1−tan2x2tanx

=1−(144/169)2(12/23)=252×12×13

=25312.