唔明點解要subsidiary angle formula bi個答案唔係就係∠AOB同埋180°-∠AOB嗎 用返a就搞掂答案係pi/2 唔係aob 因為oa=/=ob b個點轉∠AOB rad 係 o a b’ collinear 唔係 a b b’ 但係我唔明點解subsidary angle formula會爆左一隻爛既角出黎 唔係應該sub返sqrt(x^2+y^2)=sqrt26就做到?係喎 我之前諗咗第二樣嘢 唔介意嘅俾你個step嚟睇下
唔明點解要subsidiary angle formula bi個答案唔係就係∠AOB同埋180°-∠AOB嗎 用返a就搞掂答案係pi/2 唔係aob 因為oa=/=ob b個點轉∠AOB rad 係 o a b’ collinear 唔係 a b b’ 但係我唔明點解subsidary angle formula會爆左一隻爛既角出黎 唔係應該sub返sqrt(x^2+y^2)=sqrt26就做到?
唔明點解要subsidiary angle formula bi個答案唔係就係∠AOB同埋180°-∠AOB嗎 用返a就搞掂