Defining and Differentiating Vector-Valued Functions Practice Test

$\langle -\tfrac{1}{t},\ 2t\cos t-t^2\sin t,\ \tfrac{1}{\sqrt{t}}\rangle$

$\langle \ln t,\ 2t\cos t-t^2\sin t,\ \tfrac{1}{2\sqrt{t}}\rangle$

$\langle \tfrac{1}{t},\ 2t\cos t-t^2\sin t,\ \tfrac{1}{2\sqrt{t}}\rangle$

$\langle \tfrac{1}{t},\ 2t\cos t+t^2\sin t,\ \tfrac{1}{2\sqrt{t}}\rangle$

$\langle \tfrac{1}{t},\ 2\cos t-t\sin t,\ \sqrt{t}\rangle$