计算 sin5π/8*cos(7/8)π+sinπ/8-cos(3/8)π
计算 sin5π/8*cos(7/8)π+sinπ/8-cos(3/8)π
计算:cos(π/8)*sin(π/8)=?
(cosπ/8+sinπ/8)(cos^3π/8-sin^3π/8)
数学极限的运算lim α→π/2 (sinα-sin5α)/(cosα+cos5α)
求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8
【1】化简:sin(a-5π)/cos(3π-a)×cos(π/2-a)/sin(a-3π)×cos(8π-a)/sin
(sin5π/12+cos5π/12)(sinπ/12-cosπ/12)
(sin5π/12-sinπ/12)(cos5π/12+cosπ/12)=?
(cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值.
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!急救急救
sin5/12π*cosπ/12 怎么算