How should i plot this function?

t1(x, h) =cos(8*x + 5) - h*(8*sin(8*x + 5) - 27*x^8) + 3*x^9

Answer 1

[Walter Roberson]

t1 = @(x, h) cos(8*x + 5) - h.*(8*sin(8*x + 5) - 27*x.^8) + 3*x.^9;
fsurf(t1)