求值sin(π/2)*sin(π/3)+2cos(-π/2)-根号3*tan(π/3)

求值sin(-17π/3) sin(-π/4)求值 Sin(π+π/6)Sin(2π+π/6)Sin(3π+π/6).Sin(2008π+π/6)求值 sin(-7π／6)求值 sin(-4分之π)求值 sin 11π/4 求值 求值sin(π/2)*sin(π/3)+2cos(-π/2)-根号3*tan(π/3) 求值【sin(2π-α)sin(π+α)cos(-π-α)】/【sin(3π-α)-cos(π-α)】 求值:2sinπ/6+sin3π/2-2cosπ+2sinπ/3 求值sin^2(α-π/6)+sin^2(α+π/6)-sin^2α 化简求值sin^4θ+sin^4(π/3-θ)+sin^4(π/3+θ) sin^4θ+sin^4(π/3-θ)+sin^4(π/3+θ)化简求值 sin（π+π/6）sin（2π+π/6）sin（3π+π/6）.sin（2010π+π/6）求值 cos^2(π/5)+sin^2(π/10) 求值 求值:sin(26π/3)+cos(-17π/4)= 求值：sin(π/12)+cos(π/12) 求值根号(1- sin(3π/5)的平方) 三角函数求值根号3*sin(-1200)*tan19/6*π-cos585