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gfdkj135
@gfdkj135
February 2022
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Спростіть вираз sin3α*cosα+cos3α*sinα.
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ShirokovP
Verified answer
Синус суммы углов
sin(α+ β)=sin(α)·cos(β)+cos(α)·sin(β)
sin(4a)=sin(3α)·cos(a)+cos(3α)·sin(a)
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Answers & Comments
Verified answer
Синус суммы угловsin(α+ β)=sin(α)·cos(β)+cos(α)·sin(β)
sin(4a)=sin(3α)·cos(a)+cos(3α)·sin(a)