Add and simplify.
+ 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Use the Half-angle Formulas to find the exact value of the trigonometric function. cos 165°
A. - 
B. 
C. - 
D. 
Mathematics
Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-3 - 4i
A. 5(cos 126.9° + i sin 126.9°) B. 5(cos 306.9° + i sin 306.9°) C. 5(cos 233.1° + i sin 233.1°) D. 5(cos 53.1° + i sin 53.1°)
Mathematics
Graph the system of inequalities.x2 + y2 ? 36x2 + y2 ? 4
A. 
B. 
C. 
D. no solution
Mathematics
Use synthetic division to decide whether the given number is a zero of the given polynomial.-0.5; P(x) = -2x4 - 5x3 + 3x + 1
A. Yes B. No
Mathematics