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Artem32481
@Artem32481
July 2022
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сколько будет 2sin15cos15tg30ctg30 и 2cos160•cos140•cos100
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Aigul9912
2sin15cos15=sin30 (формула двойного угла)
tg30ctg30=1
2sin15cos15tg30ctg30=sin30*1=1/2
4 votes
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Answers & Comments
tg30ctg30=1
2sin15cos15tg30ctg30=sin30*1=1/2