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sasha51198
@sasha51198
August 2021
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Помогите с решением, нужно упростить
Тангенс (-а) * косинус а - синус (2пика-а)
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lidusya13
tq(-α)*cosα - sin(2πk -α) = -tqα*cosα - (-sinα) = - sinα+sinα =0 (если k ∈Z).
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oganesbagoyan
Verified answer
Tg(-a)•cos a-sin(2pi-a)=-sin a/cos a•cos a+sin a=-sin a+sin a=0
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Answers & Comments
tq(-α)*cosα - sin(2πk -α) = -tqα*cosα - (-sinα) = - sinα+sinα =0 (если k ∈Z).
Verified answer
Tg(-a)•cos a-sin(2pi-a)=-sin a/cos a•cos a+sin a=-sin a+sin a=0