Solve the problem.The electric charge q, in Coulombs, passing a given point in a circuit is given by 
where t is the time in seconds. Find the current i as a function of t 
A. 
= csc (0.4t2 + 2) - 0.8t2 csc (0.4t2 + 2) tan (0.4t2 + 2)
B. 
= csc (0.4t2 + 2) + 0.8t2 sec (0.4t2 + 2) cot (0.4t2 + 2)
C. 
= csc (0.4t2 + 2) - 0.8t2 csc (0.4t2 + 2) cot (0.4t2 + 2)
D. 
= csc (0.4t2 + 2) -t csc (0.4t2 + 2) cot (0.4t2 + 2)
Answer: C
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Solve.
= -1
A. 3 B. 1 C. -1 D. No solution
Find the difference.89.7822 - 67.3863
A. 22.3959 B. 22.2959 C. 22.3859 D. 23.3959
The figure shows an angle ? in standard position with its terminal side intersecting the unit circle. Evaluate the indicated circular function value of ?.Find csc ?.
A. - 
B. 
C. 
D. - 
Solve the problem. Use 3.14 to approximate the value of ?. Round to nearest tenth unless instructed differently.The diameter of a discus is about 8.65 in. What is the area of one flat surface of a discus? (Round to the nearest hundredth.)
A. 58.74 in.2 B. 27.16 in.2 C. 29.37 in.2 D. 234.94 in.2