Find zw or 
as specified. Leave your answer in polar form.z = 
w = 
Find 
.
A. 3
B. 3
C. 
D. 
Answer: C
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A given sine wave has a peak voltage value of 18.3 V. The instantaneous value at 270ø is
a. -18.3 V b. 0 V c. 6.8 V d. 18.3 V
Find the inverse matrix of A.A = 
A. 
B. 
C. 
D. 
Evaluate.
A. 35
B. 280
C. 70
D. 
Solve the problem.The beacon on a lighthouse 40 m from a straight shoreline rotates twice per minute. Find dx/dt where x is the distance along the shoreline from the point on the shoreline closest to the lighthouse and the point where the beam hits the shoreline.[Hint: Find an equation relating ? and x where ? is the angle between the beam of light and the line from the lighthouse to the shoreline. Use the chain rule and express d?/dt in radians per minute.]
A. 
= 160? sec ? tan ?
B. 
= 160? sec2?
C. 
= 40 sec2?
D. 
= -160? csc2?