We literally just learned that lol what are u needing help on with it
X is less then or equal to 7
Answer:
Step-by-step explanation:
Use the identity
where
and
.
This results in 
From the unit circle we know that
and 
Substitute

Simplify

Okay I can help you with your math!!
Step-by-step explanation:
Look at the picture.
A' - The complement of a set is the set of all elements in the given universal set U that are not in A.
B - A - The set difference of sets A and B is the set of all elements in A that are not in B.
A ∩ B - The intersection of sets A and B is the set of all distinct elements that are in both A and B.