Answer:
16sin^2(x)
Step-by-step explanation:
(a-b)(a+b)=a^2-b^2
(4-4cosx)(4+4cosx)
=4^2-(4cosx)^2
=16-16cos^2(x)
=16(1-cos^2(x))
=16sin^2(x)
I don't quite know
but thanks for asking
yes
no
