admin百科知識 2022-02-13 18:55:28 sin十分之派乘cos五分之派怎麽算sin十分之派乘cos五分之派怎麽算網友廻答:匿名網友sinπ/10*cosπ/5=(cosπ/10*sinπ/10*cosπ/5)/(cosπ/10)=(1/2sinπ/5cosπ/5)/(cosπ/10)=(1/4sin2π/5)/sin(π/2-π/10)=(1/4sin2π/5)/sin2π/5=1/4 db標簽 生活常識_百科知識_各類知識大全»sin十分之派乘cos五分之派怎麽算
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