Let's check.
x = 5π/24
4x = 5π/6
cos 4x = cos(5π/6) = cos 150° = -√3/2
cos² 4x = (-√3/2)^2 = 3/4
4 cos² 4x -3 = 4 (3/4) - 3 = 0
Answer: TRUE
Answer:
$3584
Step-by-step explanation:
- because its a rectangle, the area of the floor is length*width, so 16*14 = 224 square feet
- one square foot is $16, so 224 sqaure feet are 224*16
= 3584
