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Барби67
@Барби67
August 2022
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Упростите выражение 1/8 cos4a+sin(^2) a*cos(^2)a-0,375
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Anya232003
1/8cos²2a-1/8sin²2a+1/4sin²2a-0,375=
=1/8cos²2a+1/8sin²2a-0,375=
=1/8(cos²2a+sin²2a)-0,375=
=0,125*1-0,375=-0,25
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Answers & Comments
1/8cos²2a-1/8sin²2a+1/4sin²2a-0,375=
=1/8cos²2a+1/8sin²2a-0,375=
=1/8(cos²2a+sin²2a)-0,375=
=0,125*1-0,375=-0,25