Math, asked by sumerchahal7055, 1 year ago

Prove that tan 10degree Ãtan20degreeÃtan70degreeÃtan80degree=1

Answers

Answered by Anonymous

0

LHS

=Tan10° × Tan20° × Tan(90-20) × Tan(90-10)

=Tan 10°×Tan20°×Cot20°×Cot10°

=Tan10°× Tan20°× 1/Tan20° × 1/Tan10°

=1

LHS = RHS proved

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