Question

(4 – 4 cosx)(4 +4 cosx) Simplify

Answer 1

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)

Answer 2

Answer:

I don't quite know

Step-by-step explanation:

but thanks for asking