1) Consider the periodic function

cos(t) + 1/9cos(3t)

What is the period P?

a) P=6

b) P=2

c) P=2/3

d) P=2

e) P=3

f) None of the above?

Q2) Let f(x,y,z) = e^(x^2+y^2) + e^(cos(x)) * sin(yz) and suppose that F=f.

What is F at the point (1,1,1)?