Q. 275.0( 2 Votes )

Prove that :

tan 27° tan 45° tan 63°

Answer :

Taking LHS

= tan 27° tan 45° tan 63°


=tan (90° - 27°) tan 45° tan 63° [ tan θ = cot (90° - θ)]


=cot 63° tan 45° tan 63°



= tan 45° [ tan 45° =1]


=1 =RHS


Hence Proved


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