수식 3: "x" Subscript, 2 , Baseline left parenthesis, "t" , right parenthesis equals cosine left parenthesis, 3 "t" , right parenthesisx2t=cos3t
3
수식 4: left parenthesis, "x" Subscript, 1 , Baseline left parenthesis, "t" , right parenthesis , "x" Subscript, 2 , Baseline left parenthesis, "t" , right parenthesis left brace, 0 less than or equal to "t" less than or equal to "a" , right brace , right parenthesisx1t,x2t0≤t≤a
정의역 t 최솟값: 00
less than or equal to "t" less than or equal to≤t≤
