Answer: 2/3x-12=48
remember that less than means it goes to the back

Step-by-step explanation:
We know that
cos 2x = 2cos²x - 1
So we have

Substituting 

If You mean A sum to write here's one :
31+3
-0.37 is negative thirtyseven-hundredths, so in a fraction that would be -

. 37 is a prime number, so it isn't divisible by anything, meaning <span>
- 
is in simplest form.</span>
Answer c=12 bellow is a step by step explanation hope it helps