Using Malus Law, determine the following?

Question

How much of a beam of randomly polarized light will pass through a pair of polarizers set at a45 degree angle between the two?

Answer 1

50% and this is why:

according to Malus Law
I=I(initial)(cos(A))^2

cos(45)=sqrt(2)/2
(cos(45))^2=(sqrt(2)/2)^2=1/2 or 50%

Answer 2

Through the first polarizer: Half the intensity (Check your physics textbook)
Through the second polarizer: (half the intensity)xcos^2(45 degrees). Isn't the Malus law I=cos^2φ(Io) or do not I remember right?