นิพจน์ 3: left parenthesis, 7.3cos left parenthesis, "t" , right parenthesis , 7.3sin left parenthesis, "t" , right parenthesis , right parenthesis plus left parenthesis, .8 5cos left parenthesis, 2 "t" , right parenthesis , .8 5sin left parenthesis, 2 "t" , right parenthesis , right parenthesis7.3cost,7.3sint+.85cos2t,.85sin2t
โดเมน t ค่าต่ำสุด: 00
less than or equal to "t" less than or equal to≤t≤