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ЭHэнни
@ЭHэнни
August 2022
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вычислите (cos pi/12-sin pi/12)(cos pi/12+sin pi/12)
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Харли03
1 votes
Thanks 3
ЭHэнни
спасибо!
Харли03
Всегда пожалуйста!!!!
kirichekov
Verified answer
(cosπ/12-sinπ/12)(cosπ/12+sinπ/12)=
=cos²π/12-sin²π/12=cos(2*π/12)=cosπ/6=√3/2
4 votes
Thanks 7
ЭHэнни
спасибо!
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Verified answer
(cosπ/12-sinπ/12)(cosπ/12+sinπ/12)==cos²π/12-sin²π/12=cos(2*π/12)=cosπ/6=√3/2