For the smooth curve r(t) , find the parametric equations for the line that is tangent to r at the given parameter value t=t0. - r(t) =(9tant) i−(3sint) j+(10cos2t) k;t0=4π
A) x=9+18t,y=−232+232t,z=5+10t B) x=9+18t,y=−232−232t,z=5−10t C) x=9+18t,y=−23−23t,z=10−10t D) x=18+9t,y=−232−232t,z=−10+5t
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