Read the proof. What is step 2?

1. sin(2x) = cos(x)cos(x) – sin(x)sin(x)

2. sin(2x) = sin(x)cos(x) – sin(x)cos(x)

3. sin(2x) = cos(x)cos(x) + sin(x)sin(x)

4. sin(2x) = sin(x)cos(x) + sin(x)cos(x)

1. sin(2x) = sin(x + x)

2. ?

3. sin(2x) = 2sin(x)cos(x)

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.