Use identities to simplify the expression.cos x - cos x sin2 x
A. tan2 x
B. sin x
C. cos3 x
D. sec2 x
Answer: C
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Find the length of the curve.The spiral r = e4?, 0 ? ? ? ?
A. 
(e8? - 1)
B. 
(e4? - 1)
C. e8? - 
D. 
(?2 - 1)
A low pass filter has R = 18 Kê, C = 0.01 F, and Vin = 10 V. Find VO and IC at fCO.
a. IC = 0.39 mA, VO = 10.0 V b. IC = 1.82 mA, VO = 5.0 V c. IC = 1.82 mA, VO = 7.1 V d. IC = 0.39 mA, VO = 7.1 V e. IC = 0.56 mA, VO = 10.0 V
Solve the equation by the quadratic formula.2x2 = 26
A. ±
B. 14
C. 13
D. ±13
As part of a quality-control program, the chess sets manufactured by Jones Brothers are subjected to a final inspection before packing. The rate of increase in the number of sets checked per hour by an inspector t hours into the 8 A.M. to 12 noon morning shift is approximately
?
?
How many sets does the average inspector check during a morning shift? (Hint: 
.)
?
A. 196 sets
B. 185 sets
C. 193 sets
D. 189 sets