bb: left parenthesis, sin squared left parenthesis, "t" , right parenthesis , negative cos squared left parenthesis, negative "t" , right parenthesis , right parenthesissin2t,−cos2−t
ba: left parenthesis, negative sin squared left parenthesis, "t" , right parenthesis , negative cos squared left parenthesis, negative "t" , right parenthesis , right parenthesis−sin2t,−cos2−t
ซ่อน ป้ายกำกับ left parenthesis, negative sin squared left parenthesis, "t" , right parenthesis , cos squared left parenthesis, negative "t" , right parenthesis , right parenthesis−sin2t,cos2−t