Answer:

Step-by-step explanation:
Given : 
We have to write which identity we will use to prove the given statement.
Consider 
Take left hand side of given expression 
We know

Comparing , we get, a= 180° and b = q
Substitute , we get,

Also, we know
and 
Substitute, we get,

Simplify , we get,

Hence, use difference identity to prove the given result.
Answer:
1+
________
4
Step-by-step explanation:
Answer:
50
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
She earns $487.50
375+75+37.5=487.5