I guess you mean 4/5 and 3/5
this is a right angled triangle with side 3-4-5 so 5 is the hypotenuse
sin x = opp / hyp = 4/5 so the opposite side is 4
cos x = adj/hyp = 3/5 so the adjacent side = 3
so tan x = opp/adj = 4/3
Answer:
it's answer is C. 12/10 = 4 / x
Step-by-step explanation:
As the triangles are similar so
4/12 = x/10
Or cross multiply then
12/10 = 4/x
Hope it will help :)
Let's analyse the function

The amplitude is A, so we want A=1.5
Now, we start at x=0, and we have 
After one second, i.e. x=1, we want this sine function to make 330 cycles, i.e. the argument must be 
So, we have

so, the function is

Answer:
1 km < 3,000 m and 4L = 4,000 mL