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Mathematics, 16.11.2019 16:31 krishawnnn

(1- cos10° + cos40° - cos50°)/
(1 + cos10° - cos40°-cos50°) =
= tan 5º. cot 20°

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(1- cos10° + cos40° - cos50°)/
(1 + cos10° - cos40°-cos50°) =
= tan 5º. cot 20°...

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