Math, asked by hiroshima06042004, 1 month ago

Prove that : sin 54⁰+ cos 36⁰= √2 cos 9⁰

Answers

Answered by visalkumar161104

0

Answer:

cos36

∘

cos54

∘

−sin36

∘

sin54

∘

=0

cos(90

∘

−54

∘

)cos(90

∘

−36

∘

)−sin36

∘

sin54

∘

=sin54

∘

sin36

∘

−sin36

∘

sin54

∘

=sin36

∘

sin54

∘

−sin36

∘

sin54

∘

=0

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