计算:sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°+根号8的立方
问题描述:
计算:sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°+根号8的立方
写到好的在加分
答
sin60°-cos60°+2sin30°cos30°
=½√3-½+2×½×½√3
=½√3-½+½√3
=-½+√3
√3×sin60°-√2×cos45°+(√8³)
=√3×½√3-√2×½√2+16√2
=3/2-1+16√2
=½+16√2