cos12.5°等于多少
cos12.5度等于多少啊 -
cos12.5度=0.976296007
cos12°30‘cos12.5°=0.976296 亲,请【采纳答案】,您的采纳是我答题的动力,谢谢。
cos12.5度=0.976296007
cos12°30‘cos12.5°=0.976296 亲,请【采纳答案】,您的采纳是我答题的动力,谢谢。
cos12°30‘cos12.5°=0.976296 亲,请【采纳答案】,您的采纳是我答题的动力,谢谢。
10*cos12.5°=9.76296
cos172°大概等于多少,用根号表示 -
-0.9903解析:cos172°=cos(180°-172°)=-cos8°≈-0.9903~~~cos8°(12.5°-4.5°)=cos12.5°cos4.5°+sin12.5°sin4.5°可用√表示出cos8°的精确值了,
1°=π/180 弧度所以,-12.5°=12.5*π/180=5π/72弧度cos(59π/11)=cos(59π/11)=cos(5π 4π/11)=-cos(4π/11)
(cos75°-sin10°)°等于多少 -
cos75°-sin10° = sin15°-sin10° =2sin12.5°cos2.5°.
将原图作如下变换,使B、C重合,且AB⊥CD,如图易得AD=10cm,为圆直径易得S△ABE=S△ABO,S△BDF'=S△BDO(同底等高)则S△ABE+S△BDF'=S△ABD 故阴影部分面积等于半圆面积,即选C 12.5π cm²
求解:—12.5°=多少弧度?解题越详细越好 还有第二个cos( —59π/11...
1°=π/180 弧度所以,12.5°=12.5*π/180=5π/72弧度cos(59π/11)=cos(59π/11)=cos(5π 4π/11)=-cos(4π/11)
cos80cos35+cos10cos55=sin10cos35+cos10sin35=sin45=根号2/2 cos=cos45 =√2/2 =0.70710678118654752440084436210485 cos80 =sin10 ,