1、计算;27^1/3-(-1/2)^log₂⁴+sinπ/3 tanπ/3+(2010)^lgl
问题描述:
1、计算;27^1/3-(-1/2)^log₂⁴+sinπ/3 tanπ/3+(2010)^lgl
2、已知tan(3π+α)=2,求(1)(sinα+cosα)²(2)(sinα-cosα)/(2sinα+cosα)
答
答:1)27^1/3-(-1/2)^log₂⁴+sinπ/3 tanπ/3+(2010)^lgl=3-(-1/2)^2+(√3/2)*(√3)+2010^0=3-1/4+3/2+1=4+5/4=21/42)tan(3π+α)=2tana=2sina=2cosa,代入sin²a+cos²a=1有:4cos²a+cos&...