Answer:
After it is simplified you get b= - ax/1-c
Answer:
13n
Step-by-step explanation:
Add them together. They are like terms.
<u>Short answer</u> = C) 8/10
<u>Working :</u>
Tan A = 8/6 = Opposite / AdjacentOpposite = 8 units
Adjacent = 6 units
Hypotenuse = 
= 
= 
= 10 units
Cos B = Adjacent/ Hypotenuse
∴ cos B= 8/10