In: Math
The electrical voltage in a certain region of space is given by the function V(x,y,z)=80+xz−sin(yz). If the directional derivative of V at (1,1,π) in the direction 〈a,−1,π〉 is π, what is the value of a?
Group of answer choices
π22
−π22
π2
−π2
None of the above.