Complete the identity.1 - cos(2?) + cos(4?) - cos(6?) = ?
A. 4 sin ? sin(2?) sin(3?)
B. 4 sin ? cos(2?) sin(3?)
C. 4 cos ? cos(2?) sin(3?)
D. 4 cos ? cos(2?) cos(3?)
Answer: B
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Find d2y/dx2 without eliminating the parameter.x = 
, y = 
; t ? -1, 0, 1
A. 
B. 
C. 
D. 
The rectangular coordinates of a point are given. Find polar coordinates for the point.(0, 2)
A. (2, 0)
B. 
C. (2, ?)
D. 
Add or subtract as indicated. Simplify if necessary. - 
- 
A. - 
B. - 
C. - 
D. 
A cannon fires a cannonball as shown in the figure. The path of the cannonball is a parabola with vertex at the highest point of the path. If the cannonball lands 1,400 ft from the cannon and the highest point it reaches is 2,450 ft above the ground, find an equation for the path of the cannonball. Place the origin at the location of the cannon.
?
What will be an ideal response?