Find the exact value of the expression.cos2
A. 
B. 
C. 
D. 
Answer: C
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Solve:
j244 ÄÄÄÄ = j8 a. 11 ÄÄ 2 b. 11 -j2 ÄÄ 2 c. 11 j2 ÄÄ 2 d. 11 jÄÄ 2 e. 11 -jÄÄ 2
Use a table of values to graph the plane curve defined by the following parametric equations. Find a rectangular equation for the curve.x = 
, y = 4t + 3, for t in [0, 4] 
A. 
y = 4x2 + 3, for x in [0, 2]
B. 
y = -3x + 19, for x in [0, 2]
C. 
y = -3x2 + 19, for x in [0, 2]
D. 
y = 3x2 + 4, for x in [-1, 2]
Convert the length as indicated.60 inches to feet
A. 180 ft B. 5 ft C. 0.42 ft D. 20 ft
Solve the problem.The weight that a horizontal beam can support varies inversely as the length of the beam. Suppose that a 10-m beam can support 720 kg. How many kilograms can a 2-m beam support?
A. 0.0003 kg B. 36 kg C. 3600 kg D. 0.0278 kg