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merlin2010
@merlin2010
August 2021
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Вычислить: cos15п/32 * cos п/32 * cos п/16 * cos п/8
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sedinalana
Verified answer
Cos15π/32=cos(π/2-π/32)=sinπ/32
sinπ/32*cosπ/32*cosπ/16*cosπ/8=1/2*sinπ/16*cosπ/16*cosπ/8=
=1/4sinπ/8*cosπ/8=1/8*sinπ/4=1/8*√2/2=√2/16
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Answers & Comments
Verified answer
Cos15π/32=cos(π/2-π/32)=sinπ/32sinπ/32*cosπ/32*cosπ/16*cosπ/8=1/2*sinπ/16*cosπ/16*cosπ/8=
=1/4sinπ/8*cosπ/8=1/8*sinπ/4=1/8*√2/2=√2/16