Rewrite the following as a product of trigonometric functions.cos 9° - cos 33°
A. -2 cos 21° cos(-12°)
B. -2 cos 21° sin(-12°)
C. -2 sin 21° sin(-12°)
D. -2 sin 21° cos(-12°)
Answer: C
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Plot the given polar coordinate point in the polar coordinate system.
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B. 
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D. 
Use the four-step method in problem solving to solve the problem.A college cafeteria pays student cashiers $7.70 per hour. Cashiers earn an additional $1.70 per hour for each hour worked over 35 hours per week. A cashier worked 41 hours one week and 39 hours the second week. How much did this cashier earn in this two-week period?
A. $556.00 B. $616.00 C. $633.00 D. $752.00
For a low pass filter, fCO = 15 KHz and Vin = 22 V. What is VO when the input frequency is 6.1 KHz?
a. 20.4 V b. 11.0 V c. 15.6 V d. 31.1 V e. 22.0 V
Solve the absolute value equation.|9x - 5| = 0
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B. 
C. 
D. ?