Rewrite the expression as a sum or difference, then simplify if possible.

the expression    as a sum or difference is   and , is simplified as   .

Step-by-step explanation:

We need to rewrite the expression as a sum or difference , them simplify if possible  , And the expression is :

From trigonometric identity we know that

Using the above identity we get:

⇒  

⇒  

⇒  

⇒  

⇒  

Therefore , the expression    as a sum or difference is   and , is simplified as   .

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

5 pm

step-by-step explanation: