Mathematics
Senior High
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1行目から2行目への計算過程を教えて頂きたいです、、
=2sin(180"一C)cos(4スー)十2sinCcos則80?-
=2sinCcos(4ーぢ)一2sinCcos(4十戸)
ー2sin Cfcos (4ー ー)ーcos(4 †+)
4 04 ち 27GCS
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