ซ่อน ป้ายกำกับ left parenthesis, StartFraction, "x" Subscript, 1 , Baseline cos left parenthesis, 45 "t" Subscript, 1 , Baseline , right parenthesis Over 2 , EndFraction , StartFraction, "y" Subscript, 1 , Baseline sin left parenthesis, 90 "t" Subscript, 1 , Baseline , right parenthesis Over 1 , EndFraction , right parenthesisx1cos45t12,y1sin90t11
ป้ายกำกับ
equals=
left parenthesis, 0 , 0 , right parenthesis0,0
left parenthesis, 0 , negative 0.9 9 9 4 , right parenthesis0,−0.9994
left parenthesis, negative 0.5 0 5 7 , 0 , right parenthesis−0.5057,0