已知ABC三点,其中A(cos a,sin a),B(cosb,sinb),C(cosr,sinr) 若OA+kOB+(2-k)OC=0 (k为常数且0<k<2已知ABC三点,其中A(cos a,sin a),B(cosb,sinb),C(cosr,sinr)若OA+kOB+(2-k)OC=0 (k为常数且0<k<2),O为坐标原点,求①cos(b-r)的最
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 07:20:21
![已知ABC三点,其中A(cos a,sin a),B(cosb,sinb),C(cosr,sinr) 若OA+kOB+(2-k)OC=0 (k为常数且0<k<2已知ABC三点,其中A(cos a,sin a),B(cosb,sinb),C(cosr,sinr)若OA+kOB+(2-k)OC=0 (k为常数且0<k<2),O为坐标原点,求①cos(b-r)的最](/uploads/image/z/2512309-13-9.jpg?t=%E5%B7%B2%E7%9F%A5ABC%E4%B8%89%E7%82%B9%2C%E5%85%B6%E4%B8%ADA%28cos+a%2Csin+a%29%2CB%28cosb%2Csinb%29%2CC%28cosr%2Csinr%29+%E8%8B%A5OA%2BkOB%2B%282-k%29OC%3D0+%28k%E4%B8%BA%E5%B8%B8%E6%95%B0%E4%B8%940%EF%BC%9Ck%EF%BC%9C2%E5%B7%B2%E7%9F%A5ABC%E4%B8%89%E7%82%B9%2C%E5%85%B6%E4%B8%ADA%28cos+a%2Csin+a%29%2CB%28cosb%2Csinb%29%2CC%28cosr%2Csinr%29%E8%8B%A5OA%2BkOB%2B%282-k%29OC%3D0+%28k%E4%B8%BA%E5%B8%B8%E6%95%B0%E4%B8%940%EF%BC%9Ck%EF%BC%9C2%29%2CO%E4%B8%BA%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2C%E6%B1%82%E2%91%A0cos%28b-r%29%E7%9A%84%E6%9C%80)
xSN@~Z[dG}ޑNj%#RH(
j%"$pi߀
]hꥇ]37rD&/m]FLe+uƂ2cD:qjĩf=1U65xcX;-CKzhv W|lld{\ @GSX'5\C*4_
/4S_#bO,Fz15i2PwC