Write the expression as a trigonometric function of a positive number.sin (-8.75)

A. sin 8.75
B. -sin 8.75
C. cos 8.75
D. -cos 8.75

Answer: B

Mathematics

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A certain drug has a concentration of C milligrams per liter in the bloodstream t hours after it is administered. The relationship is

. ? A: Make a graph of C versus t for up to 10 hours after the drug is administered.B: The drug is most effective when the concentration is at least 1.5 milligrams per liter. Add the graph of to the graph you made in part A.C: During what time period is the drug most effective? Round your answer to two decimal places. What will be an ideal response?