Expression 3: left parenthesis, StartFraction, "t" Over "n" , EndFraction plus left parenthesis, 2 minus "n" times 0.8 , right parenthesis , StartFraction, "n" Over 8 , EndFraction times cos left parenthesis, "n" , right parenthesis plus sin left parenthesis, "t" Superscript, 1 half , Baseline negative "t" Subscript, 2 , Baseline negative "n" squared , right parenthesis times cos left parenthesis, "t" Subscript, 2 , Baseline minus StartFraction, "t" squared Over "n" squared , EndFraction , right parenthesis times sin left parenthesis, "t" , right parenthesis , right parenthesistn+2−n·0.8,n8·cosn+sint12−t2−n2·cost2−t2n2·sint
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domain t Minimum:
less than or equal to "t" less than or equal to≤t≤