Answer: 
Step-by-step explanation:
Given

lies in the fourth quadrant
So, sine must be negative in the fourth quadrant
Using identity
to find sine value


Answer:
I think the answer is undefined because the question above is an expression of f of x not a statement of variation which should have a constant of proportionality
Step-by-step explanation:
5×6'3n=20
30'3n=20
3n=20-30
3n/3= -10/3
n= -3