Answer:
1)
2)0
Step-by-step explanation:
for part 1:
Given cos(x) - cos^3(x)
= cos(x) (1- cos^2(x))
Using the identity 
= cos(x)sin^2(x)
for part 2:
given
=
Using the identity cos(a)cos(b) + sin(a)sin(b)= cos(a-b)
=
=
=
=0!
Answer:
you
Step-by-step explanation:
scrwed
Answer:
sdfghjjhgfdcxcvbhjh
Step-by-step explanation:
Answer:
no clue
Step-by-step explanation:
but good luck i belive in yoyu