Use half-angle identities to find the exact value of the expression.cos 165°
A. - 
B. - 
C. 
D. 
Answer: A
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Solve the polynomial equation by factoring.x3 + 3x2 - x - 3 = 0
A. 1, -1, 3 B. 1, -2, 5 C. 1, -1, -3 D. 1, -1, -4
Given the terms of a finite sequence, classify it as arithmetic, geometric, or neither.100, 112, 136, 172, 220
A. Geometric B. Arithmetic C. Neither
Provide an appropriate response.Which one of the following is a description of the graph of the solution set for the system below?x2 + y2 ? 364x2 + 9y2 ? 36
A. The area inside the circle (defined by the first equation) and outside the ellipse (defined by the second equation), including both borders. B. The area inside the ellipse (defined by the second equation) and outside the circle (defined by the first equation), including both borders. C. The area inside the ellipse (defined by the second equation), including the border. D. None of these
Write in scientific notation.0.000407
A. 4.07 × 10-5 B. 4.07 × 104 C. 4.07 × 10-4 D. 4.07 × 10-3