CBSE BOARD X, asked by rekhadumre6, 20 days ago

Prove that): cos 20° + sin 20°÷[cos20°+ sin20°] =tan 250

Answers

Answered by KGauthamiBhat

0

Explanation:

LHS=

cos20

∘

−sin20

∘

cos20

∘

+sin20

∘

=

1−tan20

∘

1+tan20

∘

=

1−tan45

∘

tan20

∘

tan45

∘

+tan20

∘

=tan(45

∘

+20

∘

)=tan65

∘

=RHS

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