Use the fundamental identities to simplify the expression.
A. csc x
B. sec x
C. -sec x
D. 1
Answer: B
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Without graphing the function, determine its amplitude or period as requested.y = 5 cos xFind the period.
A. 5
B. ?
C. 
D. 2?
Solve the system by the substitution method.
A. {(8, 2), (-8, -2), (8, -2), (-8, 2)} B. {(8, 2), (-8, -2), (2, 8), (-2, -8)} C. {(-8, -2), (-2, -8), (-8, 2), (-2, 8)} D. {(8, 2), (2, 8), (8, -2), (2, -8)}
Solve the problem.The James family wants to save some money in interest by paying off their auto loan 12 months early. The 36-month loan required payments of $455 per month. The car cost $18,600 with a down payment of $6000. How much unearned interest did they save?
A. $468.00 B. $1702.70 C. $1486.84 D. $442.70
Simplify the polynomial by adding or subtracting, as indicated. Express your answer as a single polynomial in standard form.Find the sum of (6x5 - 4x3 + 9x) and (2x5 + 8x3 - 7x).
A. 8x5 + 4x3 + 2x B. 14x9 C. 8x + 4x5 + 2x3 D. 11x5 + 14x3 - 11x