Since a and 5 aren't like terms, you would write the expression as 
Answer: 
Step-by-step explanation:





Answer:
Multiply each as in like 120 multiply by 1.2. If 60 multiply by 0.6.
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
Hi, We know:
Sin(a + b) = 2.Sin(a).Sin(b)
Then,
= 2Sin(a).Cos(b)/Cos(a).Cos(b)
Canceling Cos(b)
= 2Sin(a)/Cos(a)
As Tan(a) = Sin(a)/Cos(a)
Then we will stay:
= 2Tan(a)
Or
= Tan(a) + Tan(a)
There is anything wrong on the alternatives