Use a reference angle to find the value. cos 120°
A. - 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Find the limit.
cos 
A. 0
B. -1
C. 
D. 1
Mathematics
Find the moment or center of mass of the wire, as indicated.Find the moment about the x-axis of a wire of constant density that lies along the first-quadrant portion of the circle x2 + y2 = 16.
A. 16
B. 
C. 4
D. 
Mathematics
Use a calculator to find the function value to four decimal places.tan (1.27)
A. 0.9551 B. 3.2236 C. 0.2963 D. 3.3752
Mathematics
Simplify the expression.
+ 
A. 
B. 
C. 
D. 
Mathematics