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ElementalOfChaos
@ElementalOfChaos
August 2022
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Вычислите sin 2a, cos 2a и tg 2a, если sin a = 1/2 и Пи/2 меньше a меньше Пи! Срочно!
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Answers & Comments
ddonor89
Sin2a =2sinacosa
cos2a=cos²a-sin²a
tg2a= 2tga/1-tg²a
2 votes
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Answers & Comments
cos2a=cos²a-sin²a
tg2a= 2tga/1-tg²a