bycj.net
当前位置:首页 >> sin8度 >>

sin8度

8度8分=8.133度 sin8.133゜=0.1415

0.14是数值

题干模糊不清

sin8=sin(15-7),cos8=cos(15-7)带入,可得原式=tan15 追问: 高一数学 ,,你的方法不理解 希望采纳

sin53=sin(180-127)=sin127=0.8

(sin7+cos15sin8)/(cos7-sin15sin8) =[sin7+cos(7+8)sin8]/[cos7-sin(7+8)sin8] =[sin7+(cos7cos8-sin7sin8)sin8]/[cos7-(sin7cos8+sin8cos7)sin8] =(sin7+cos7cos8sin8-sin7sin²8)/(cos7-sin7sin8cos8-sin²8cos7) =(sin7-sin7sin&sup...

sin1=0.01745240643728351 sin2=0.03489949670250097 sin3=0.05233595624294383 sin4=0.0697564737441253 sin5=0.08715574274765816 sin6=0.10452846326765346 sin7=0.12186934340514747 sin8=0.13917310096006544 sin9=0.15643446504023087 sin...

39×sin8°=39×0.13917=5.42763(米), 高度差5.42763米。

给你举个例子:cos12度×cos98度-sin12度×cos8度=-cos12°×sin8°-sin12°×cos8° =-sin(12°+8°) = -sin20

角度a 0° 30° 45° 60° 90° 120° 180° sina 0 1/2 √2/2 √3/2 1 √3/2 0 cosa 1 √3/2 √2/2 1/2 0 -1/2 -1 tana 0 √3/3 1 √3 无限大 -√3 0 cota / √3 1 √3/3 0 -√3/3 / 望采纳吆~亲

网站首页 | 网站地图
All rights reserved Powered by www.bycj.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com