sin 11π/4 求值

sin 11π/4 求值 sin(-π/4)求值 sin(-4分之π)求值 sin(-7π／6)求值 求值sin(-17π/3) 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 求值:sin(26π/3)+cos(-17π/4)= 求值：sin(π/12)+cos(π/12) 求值：sin[1/2arctan(-4/3)] 三角函数求值：4Sin(2π/11)+tan(3π/11) ( π 是pai )请勿使用计算机得出答案 求值sin^4(π/8)+cos^4(π/8) 答对有分`求值sin^4(π/8)+cos^4(π/8)```过程 求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3 sin(π+π/6)-cos(π+π/4)cos(-π/2)+1求值 求值：sin(π/4)cos(19π/6)tan(21π/4)急! 求值:sin(-31π/6)-cos(-10π/3)-sin11π/4 sin^4 (5π/8）-cos^4 （5π/8） 求值 求值sin^4(π/8)+cos^4(π/8) 答对有分`