Rainie
30 ตุลาคม 2010, 15:27
T1. A triangle having two rational-cosine angles of the same Class will have either three rational sides or three irrational sides.
T2. The sum of two angles that have rational cosines of the same Class is another angle of the same Class.
ช่วยหน่อยนะคะ ขอบคุณมากค่ะ :sung:
T2. The sum of two angles that have rational cosines of the same Class is another angle of the same Class.
ช่วยหน่อยนะคะ ขอบคุณมากค่ะ :sung: