8sin(π/32)cos(π/32)cos(π/16)cos(π/8),求值

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运用公式sin2α=2sinαcosα
8sin(π/32)cos(π/32)cos(π/16)cos(π/8)
=4×2sin(π/32)cos(π/32)cos(π/16)cos(π/8)
=4×sin(π/16)cos(π/16)cos(π/8)
=2×2sin(π/16)cos(π/16)cos(π/8)
=2sin(π/8)cos(π/8)
=sin(π/4)
=√2/2

8sin(π/32)cos(π/32)cos(π/16)cos(π/8),求值求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8 求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8!急救急救 cos(π/32)*cos(π/16)*cos(π/8)= 求值：sin(π/12)+cos(π/12) 求值cos5π/8*cosπ8 cos sin π √ 求值：⑴sin(-19π/3)*cos(19π/6) 根号2sinπ/32*cosπ/32*cosπ/16*cosπ/18 怎么化简不用计算器求值sinπ\8 cosπ\8=sin^2 π\12-cos^2 π\12=化简：（cosx+sinx)^2= (cosπ/8+sinπ/8)（cos^3π/8-sin^3π/8） (cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值.