Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.sec 
A. sec 
B. csc 
C. 1 - sec 
D. -sec 
Answer: A
Mathematics
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Find the limit.
A. 
B. 0
C. 1
D. 
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Evaluate the logarithm without the use of a calculator.log9 729
A. 3 B. 9 C. 729 D. 27
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State the domain of the rational function.f(x) = 
A. (-?, ?) B. (-?, 6) ? (6, ?) C. (-?, -54) ? (-54, ?) D. (-?, -6) ? (-6, ?)
Mathematics
Use trigonometric identities to solve each equation in the interval [0, 2?]4 sin2 x = 4 cos x + 1
A. 
B. 
C. ?
D. 
Mathematics