A particle moves along a parametrized curver(t)

in space.

Findr(t₀) at the instant whent=t₀,

given the following facts. (Your instructors prefer angle bracket notation< >for vectors.)

• The instantaneous radius of curvature whent=t₀
• is(t₀) =4m.
• The unit normal vector whent=t₀
• is given by(t₀) =1
• 4
• 3
• ,2,3.
• The coordinates of the center of the osculating circle whent=t₀
• are(11,5,4).

r(t₀) =