Complete the identity.
= ?
A. cos 2x
B. sin 2x
C. tan 2x
D. cot 2x
Answer: B
Mathematics
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Express the set in roster form.The set of the days of the week
A. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday} B. {Saturday, Sunday} C. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Sunday} D. {Tuesday, Thursday}
Mathematics
Solve the problem.(n - 1)! =
A. 
B. n! - 1!
C. n × (n - 1)!
D. 
E. none of these
Mathematics
Solve the inequality. Express your answer using interval notation.|x| < -6
A. (-6, 6) B. {-6} C. (-?, ?) D. no solution
Mathematics
Simplify.
A. 
B. -y
C. 
D. 
Mathematics