Answer:
D
Step-by-step explanation:
Jessica tipped the driver about $4.75 or $4.756
We can model the problem using a right angle triangle.
The two sides, AB and BC are equal
By Pythagoras, we find the length of AC =
![\sqrt{1^+1^}](https://tex.z-dn.net/?f=%20%5Csqrt%7B1%5E%2B1%5E%7D%20)
=
![\sqrt{2}](https://tex.z-dn.net/?f=%20%5Csqrt%7B2%7D%20)
Using the sin ratio ⇒ sin θ = opposite/hypotenuse, we have
![sin(45)= \frac{1}{ \sqrt{2} }= \frac{ \sqrt{2} }{2}](https://tex.z-dn.net/?f=sin%2845%29%3D%20%5Cfrac%7B1%7D%7B%20%5Csqrt%7B2%7D%20%7D%3D%20%5Cfrac%7B%20%5Csqrt%7B2%7D%20%7D%7B2%7D%20%20)
Using the cos ratio ⇒ cos θ = adjective/hypotenuse, we have
![cos(45)= \frac{1}{ \sqrt{2} }= \frac{ \sqrt{2} }{2}](https://tex.z-dn.net/?f=cos%2845%29%3D%20%5Cfrac%7B1%7D%7B%20%5Csqrt%7B2%7D%20%7D%3D%20%5Cfrac%7B%20%5Csqrt%7B2%7D%20%7D%7B2%7D%20%20)
Using the tan ratio ⇒ tan θ = opposite/adjective, we have
D. 15+18
Hope that helps!