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gfdkj135
@gfdkj135
February 2022
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Спростіть вираз
(соs5α+соs9α)/(sіn 5α+sin9α)
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oganesbagoyan
Verified answer
Спростіть вираз (соs5α+соs9α)/(sіn 5α+sin9α)
(соs5α+соs9α)/(sіn 5α+sin9α) =2cos7x*cos2x/2sin7x*cos2x =ctq7x
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Verified answer
Спростіть вираз (соs5α+соs9α)/(sіn 5α+sin9α)(соs5α+соs9α)/(sіn 5α+sin9α) =2cos7x*cos2x/2sin7x*cos2x =ctq7x