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arturguletskiy
@arturguletskiy
July 2022
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Упростить выражение (подробное решение)
8cos4α×cos2α×cosα×sinα
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Хуqожнuк
8cos4a * cos2a * sina * cosa =
= 4cos4a * cos2a * 2sinacosa =
= 4cos4a * cos2a * sin2a =
= 2cos4a * 2cos2asin2a =
= 2cos4a * sin4a = cos8a
sin2x = 2cosxsinx
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Answers & Comments
= 4cos4a * cos2a * 2sinacosa =
= 4cos4a * cos2a * sin2a =
= 2cos4a * 2cos2asin2a =
= 2cos4a * sin4a = cos8a
sin2x = 2cosxsinx