Find the parametric equations that define the curve shown.
A. x = 5sin , y = -3 cos
; 0 ? t ? 3
B. x = 3sin , y = -5 cos
; 0 ? t ? 4
C. x = 5sin , y = -3 cos
; 0 ? t ? 4
D. x = -3sin , y = 5 cos
; 0 ? t ? 3
Answer: C
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A. 
B. 
C. 
D. 
The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 12 sin t - cos tFind the body's acceleration at time t = ?/4 sec.
A. - 
m/sec2
B. 
m/sec2
C. - 
m/sec2
D. 
m/sec2
Solve the problem.Find the difference in altitude between a mountain 3225 feet above sea level and an ocean floor 71 feet below sea level.
A. 3154 feet B. 3296 feet C. -3154 feet D. -3296 feet
Find the numerical value of the expression for 
and 
A. a) - 
b) 
B. a) 
b) 
C. a) 
b) - 
D. a) - 
b) 