Write the complex number in trigonometric form. Begin by sketching the graph to help find the argument ?.
?
What will be an ideal response?
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Solve the problem.In the study of alternating electric current, capacitive voltage is given byVc = - 
cos 2?ft,where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 2?f cos 
B. t = 
arccos 
C. t = 
arccos 
D. t = 2?f arccos 
Provide an appropriate response.Suppose the height h in meters of fireworks fired straight upward from the ground is given by h = 24.5t - 4.9t2 where t is in seconds. When will the fireworks be 20 meters off the ground?
What will be an ideal response?
Solve the problem.How many different 10-letter words (real or imaginary) can be formed from the letters in the word PHILOSOPHY?
A. 907,200 B. 453,600 C. 3,628,800 D. 45,360
Set up the percent proportion for the application problem. Do not try to solve for any unknowns.A chemical is 78% pure. In 760 grams of the chemical, how much is pure?
A. 
= 
B. 
= 
C. 
= 
D. 
= 