Use a reciprocal identity to find the indicated trigonometric function of ?.sec ? if cos ? = - 
A. -
B.
C.
D. -
Answer: D
Mathematics
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Find the indicated cardinal number.Find n(E), given that n(C × E) = 18 and C = {4, 5, 6}.
A. 3 B. 6 C. 54 D. 9
Mathematics
Use the decibel scale to answer the question.How many times as loud as the softest audible sound is the sound of threshold of pain for human ear (90 decibels)?
A. 103 B. 1090 C. 1018 D. 109
Mathematics
Let A = {1, 3, 5, 7}; B = {5, 6, 7, 8}; C = {5, 8}; and
Determine whether the given statement is true or false.U ? A
A. True B. False
Mathematics
Find .
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics