sin10°cos50°+sin50°cos10°的三角函数值
来源:百度知道 编辑:UC知道 时间:2024/05/29 10:12:48
sin10°cos50°+sin50°cos10°
=sin(10°+50°)
=sin60°
=根号3/2
=sin(10 + 50) = sin60 = 根号3/2
通过计算数值为
sin10°=0.17364817766693034885171662676931
cos50°=0.64278760968653932632264340990726
sin50°=0.76604444311897803520239265055542
cos10°=0.98480775301220805936674302458952
SO IT IS:
sin10°cos50°+sin50°cos10°=
0.11161889704894966022053988042259+0.75440650673548898654318329032969
=0.86602540378443864676372317075159
公式推导:
sin10=cos80
cos50=sin40
sin50=cos40
cos10=sin80
cos80*sin40+cos40*sin80
=cos(90-10)sin40+cos40(sin90-10)
=sin60°
(sin10°+cos50°)/(cos10°-sin50°)????
Cos10°cos50°cos70°=
观察以下等式:sin20°的平方 cos50°的平方 sin20°×cos50°=?
sin40°*(1-sin10°)/[sin10°*(cos20°)^2]
sin10°sin30°sin50°sin70°=?
sin10°*sin40°+cos10°*sin50°
1/sin10°-(根号3)/cos10°
请问一下这道高一数学题 tan70@°+sin10°
(cot5°-tan5°)×(1-cos20°)/(3sin50°-√3×cos50°)=?
求2sin20°+2cos°5°+tan20°sin10°的值