函数规律sin^2 π/6+cos^2 π/3+sin π/6 cosπ/3=3/4sin^2 π/9+cos^2 5π/18+sin π/9 cos5π/18=3/4观察以上式子得到一般规律式是?

问题描述:

函数规律
sin^2 π/6+cos^2 π/3+sin π/6 cosπ/3=3/4
sin^2 π/9+cos^2 5π/18+sin π/9 cos5π/18=3/4
观察以上式子得到一般规律式是?

得到一般规律式是:
sin^2(x)+cos^2(x+π/6)+sinx*cos(x+π/6)=3/4