Expression 7: "y" equals left parenthesis, "x" minus sin "t" , right parenthesis squaredy=x−sint2
7
Expression 8: "y" greater than left parenthesis, "x" minus "t" squared , right parenthesis squaredy>x−t22
8
Expression 9: "y" less than StartFraction, 1 Over left parenthesis, 1 plus "t" squared , right parenthesis left parenthesis, 1 plus "x" squared , right parenthesis , EndFractiony<11+t21+x2
9
Traveling wave:
10
Expression 11: "y" less than hyperbolic secant left parenthesis, 2 left parenthesis, "x" minus "t" , right parenthesis , right parenthesisy<sech2x−t
11
Standing wave:
12
Expression 13: "y" equals sine left parenthesis, "t" , right parenthesis sine left parenthesis, "x" , right parenthesisy=sintsinx