Use the fundamental identities and appropriate algebraic operations to simplify the expression.cos x (csc x - sec x) - cot x
A. -1
B. 0
C. cos2x - tan2x
D. 1
Answer: A
Mathematics
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Find the profit in year 8 of the operation.
A. $42,700 B. $52,150 C. $18,900 D. $60,000
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Write out the terms of the series.
A. 3 + 4 + 5 + 6 B. 3 + 4 + 5 + 6 + ... C. 6 + 7 + 8 + 9 D. 2 + 3 + 4 + 5
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Solve the problem.There are currently 57 million cars in a certain country, increasing exponentially by 0.8% annually. How many years will it take for this country to have 64 million cars? Round to the nearest year.
A. 243 yr B. 14 yr C. 5 yr D. 9 yr
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?
Find the cofactor A12 of the matrix.
?
A. 
B. 
C. 
D. 
E. none of these
Mathematics