Answer:
1
Step-by-step explanation:
cos²θ (1 + tan²θ)
Use Pythagorean identity:
cos²θ (sec²θ)
1
Because there is an absolute value in this equation around the x and and you are only adding something to that, we know that this will always be positive. This eliminates all the choices except for [1,infinity), the third option.
The volume of a cone is V = 1/3 pi r^2 h
h = 8
pi = 3.14
V =471.24
r = ???
d = ???
471.24 = 3.14 * 8 * r^2
471.24 = 25.12 * r^2
471.24 / 25.12 = r^2
18.76 = r^2
r = sqrt(18.76)
r = 4.312
The diameter is 2*4.312 = 4.624 in. <<<<<==== answer.
