$$\text { For the curve given by } \mathbf { r } ( t ) = \langle 2 \sin t , 5 t , 2 \operatorname { cost } \} \text {, find the unit normal vector. }$$

Short Answer

$$\text { For the curve given by } \mathbf { r } ( t ) = \langle 2 \sin t , 5 t , 2 \operatorname { cost } \} \text {, find the unit normal vector. }$$