Determine the specific solutions (if any) to the equation on the interval [0, 2?).cos2 ? + 2 cos ? + 1 = 0
A. ?
B. 
, 
C. 2?
D. 
, 
Answer: A
Mathematics
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Solve the number problem by finding the value of the unknown number.The sum of 7 and four times a number is 
.
A. 
B. 0
C. 
D. 
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Simplify the power of i.i30
A. -i B. -1 C. 1 D. i
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Solve the problem.If cot ? = -7.1, find the value of cot ? + cot (? + ?) + cot (? + 2?).
A. -21.3 + 3? B. -19.3 C. -21.3 D. undefined
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If Rita receives $34.06 interest for a deposit earning 4% simple interest for 260 days, what is the amount of her deposit to the nearest dollar? Use a 360-day year. ?
A. $1,061 B. $1,179 C. $1,238 D. $1,120 E. $1,297
Mathematics