Question

Value of tan80⁰tan75⁰tan15⁰tan10⁰

Answer 1

Answer:

$\tan(80) . \tan(75) . \tan(15) . \tan(10) \\ \tan(90 - 10) . \tan(90 - 15) . \tan(15) . \tan(10) \\ \cot(10) . \tan(10) . \cot(15) . \tan(15) \\ = 1 \: \: \: ans.$

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Answer 2

Step-by-step explanation:

tan(80).tan(75).tan(15).tan(10)

tan(90−10).tan(90−15).tan(15).tan(10)

cot(10).tan(10).cot(15).tan(15)

=1ans.