驗證網址answers.yahoo.com安全性

Find the exact value of sin 30 degrees cos 60 degrees +cos 30 degrees sin 60 degrees.? | Yahoo Answe

2008/1/22 ·  sin 30 degrees cos 60 degrees +cos 30 degrees sin 60 degrees = sin(30º+60º)=sin 90º = 1 Saludos. lou h · ......

網址安全性掃描由 google 提供