You can see that the function is graphed for every number x that is greater than or equal to zero.
So we write that the domain is

.
So for this I would set up a ratio. 1/10=x/380 then you cross multiply so 1x380=10x. Then solve the equation so 380/10=x and you get 38in. Hope my explanation helped!
I don’t understand your question can you explain it more
Answer:

Step-by-step explanation:
Given

See attachment
Required
Explain and correct the error
The error in the equation is that: the formula of cosine of angle A is used to calculate the sine of angle A.
The ratio can be corrected as by using:


