sinπ/2010+cos2009π/2010等于多少?

sinπ/2010+cos2009π/2010等于多少? 1.点P(tan2009°,cos2009°)位于第几象限?2.函数y=sin(2x+π/6)+cos(2x+π/3)的最小正周期和最大值分别 sinπ/2是什么意思 计算,sin(π/12)-sin(5π/12)+2sin(π/8)sin(3π/8) 化简sin(α+β)+sin(α-β)+2sinαsin(3π/2-β)= sin（π+π/6）sin（2π+π/6）sin（3π+π/6）.sin（2010π+π/6） sin（π+π/6）sin（2π+π/6）sin（3π+π/6）.sin（2010π+π/6）求值 sin^2(π/3-x)+sin^2(π/6+x) 化简:sin(-a)cos(2π+a)sin(-a-π) 1-2sin²π/8=sinπ/4 2sin(x+π/4)sin(x-π/4)=? Sin(π+π/6)Sin(2π+π/6)Sin(3π+π/6).Sin(2008π+π/6)求值 sin(-2π-a)是等于sin(-a)? 2sin(α+π/3）=sinα+______ 为什么sin(2π-α)=-sinα? sin^2(π/4 +x) sin(πx/2)求导 化简sin(2π+a)