the velocity of a particle moving along the x-axis at any time t>=0 is given by

Question

v(t)=cos(pi t)-t(7-2pi)
find the acceleration at any time t

Answer 1

since a = dv/dt
v = cos(πt) - 7t + 2πt
a = =πsin(πt) - 7 + 2π

Answer 2

shouldn't it be a=-pi sin(pi t)-7+2pi then?

Answer 3

Yes, just noticed that I must have hit the = key instead of the -
notice I have ==
good catch!