Q. 225.0( 2 Votes )

Prove that :

sin229o + sin261o=1

Answer :

Taking LHS= sin229o + sin261o

cos2 (90° - 29°) + sin2 61° [ Sin θ = cos (90° - θ)]


cos2 61° + sin2 61°


= 1 =RHS [ cos2 θ + sin2 θ = 1]


Hence Proved


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