Answer:
B. 2cos3θsinθ.
Step-by-step explanation:
Use the identity
sin x - sin y = 2 [cos(x + y)/2]sin [x - y)/2].
So we have:
sin4θ - sin2θ = 2 cos (4θ+2θ)/2 sin (4θ-2θ)/2
= 2cos3θsinθ.
Surface area, but there is a wrinkle which we'll talk about later.
The area is front and back top and bottom left and right, six sides in all.
Left / Right
Area = 10 * 8 = 80 cm^2
2 Sides Area = 2 * 80 cm^2 = 160 cm^2
Top / Bottom
Area = 10 * 12 = 120
2 Side Area = 2 * 120 = 240 cm^2
Ends
Area = 8 * 12 cm = 96 cm^2
2 sides = 2 * 96 = 192 cm^2
Total Area
The total area of all six sides is 192 + 240 + 160 = 592 cm^2
Comment and Answer
592 cm^2 <<<< Answer
There might be a problem with overlap. Right at the edge of face the gluing of the tiles stops. Do you put on one more layer or not. I would say not. You have to be told to do that. I think the question just requires a straight forward reply. If not, write me a message.
The answer is D, i hope to have helped you
X - 15 > 2x + 8 (I'm 99%) sure that is the answer
