Recent content by baokhuyen

But how can I eliminate t and make a function of x and y?

Homework Statement how can we eliminate the parameter of these functions: x= t-2 y= t^2 +1 and sketch its curve Homework Equations The Attempt at a Solution I can't find the relations between these 2 functions

Homework Statement how to find the domain of an vector function? Homework Equations The Attempt at a Solution

Homework Statement How can I eliminate tha parameter of these equations: x=sec x, y=tan x Homework Equations The Attempt at a Solution

Homework Statement sketch the curve of parametric equations: x= e^-t + t y= e^t - t Homework Equations The Attempt at a Solution I don;t know how to eliminate the parameter Can anyone help me?

For example, I say: (b- a(a.b)/a^2).a=0 (b-(a.b)/a).a=0 a.b-a.((a.b)/a)=0 How can I do next?

Homework Statement I get confused with this problems show that the vector (orth of b onto a) = (b - proj of b onto a) is orthogonal to a. Homework Equations The Attempt at a Solution (b-proj of b onto a) dot a = 0 and I got stuck!

k(a,b,c)=(ka,kb,kc)=(-2k,4k,2k) lenght= root(4k^2+16k^2+4k^2)=6 => root( 24k^2) =6 => k*root(24)=6 =>k= 6/root(24)= 3/root6 oh I got it, Thank you very much! Ziox AND Antineutron

Homework Statement Can anyone help me with his problem: how to find a vector that has the same direction as <-2,4,2> but has length 6 Homework Equations The Attempt at a Solution the length of that vector is: 6= (-2)^2*a^2+(4)^2*b^2+(2)^2*c^2 Then I don't know what to do next?