www.fltk.net > Cos80°Cos35° Cos10°Cos55°

Cos80°Cos35° Cos10°Cos55°

cos80cos35+cos10cos55=sin10cos35+cos10sin35=sin(10+35)=sin45=2/2

cos80cos35+cos10cos55=sin10cos35+cos10sin35=sin(10+35)=sin45=2/2

:cos80cos35+cos10cos55=sin10cos35+cos10sin35=sin(10+35)=sin45=2/2sin/12+cos/12=2(2/2sin/12+2/2cos/12)=2sin(/4+/12)=2sin/3=6/2cos105+sin195=cos105+sin(90+105)=cos105+cos105=2cos105=2cos(60+

cos80cos35+cos10cos55=cos80cos35+sin80sin35=cos(80-35)=cos45=2/2=0.70710678118654752440084436210485

1cos80cos35+cos10cos55=cos80cos35+sin80sin35=cos(80-35)=cos45=2/22cos15-sin15=cos(2x15)=cos30=3/2

ԭʽ=sin10 cos35 +cos10 sin35 =sin(10 +35 )=sin45 = 2 2

ԭʽ=cos80cos35+sin80sin35=cos(80-35)=cos45

cos100=-cos80=-sin10 cos55=sin35 ԭʽ=cos10*cos35-sin10*sin35 =cos(10+35) =2/2

cos80cos35cos80cos35cos(8035)cos45ڶ֮Ŷ

cos80cos35+cos10cos55=sin10cos35+cos10sin35=sin45=2/2 cossin10 cos35 + cos10 sin35 =sin45 =2/2 ϣҵĻش

վͼ

All rights reserved Powered by www.fltk.net

copyright ©right 2010-2021
www.fltk.net磬ַϵͷzhit325@qq.com