Recent content by danny_manny

oh I see, thanks.

That's the part I'm stuck at do i set the lhs equal to zero?

what do you mean by pivots?

v(0) = -sin(0)i +cos(0)t + c = 0i+1j+c

Sorry Sammy I'm still lost :(

so the answer must be (1-sin(t))i+(cos(t)+1)j ? in the book however the answer is given (1-sin(t))i+(cos(t)-1)j I don't know where I'm going wrong. Thanks again.

so the vector constant should be equal to i no?

Homework Statement Use the given information to find the position and velocity vectors of the particle. a(t) = −cos t i − sin t j; v(0) = i; r(0) = j Homework Equations The Attempt at a Solution Ok first step integrate a(t). which i get to be -sin(t)i +cos(t)j + c now...

Try integration by parts.

Homework Statement I just don't understand how one chooses a free variable when using Gaussian elimination and back substitution to solve linear equations Homework Equations The Attempt at a Solution One particular example here is provided (already in row echelon form) -2...

nvm I looked it up.

So the answer is, cos(t)-tsin(t)-2tsin(t)-t^(2)cos(t)

ah mustn't be my day :(

cos(t)-tsin(t)-2tsin(t)-t^(2)cost(t)-t

tcos(t)-t^(2)sin(t)-1