Question

计算：sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°＋根号8的立方 大家帮帮忙撒,,

写到好的在加分

Answer 1

sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°＋根号8的立方
=√3/2-1/2+2×1/2×√3/2×√3×√3/2-√2×√2/2+8×2×√2
=√3/2-1/2+3√3/4-1+16√2
=5√3/4-3/2+16√2
=（5√3-6+64√2）/4

Answer 2

2分之根号3减去2分之一加上2分之根号3= 根号3减去1/2

Answer 3

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