Find all values of ?, if ? is in the interval [0, 360°) and has the given function value.cos ? = 
A. 30° and 330°
B. 45° and 225°
C. 225° and 315°
D. 135° and 225°
Answer: A
Mathematics
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Evaluate the integral.
dt
A. 20
B. 4 ln 5
C. 
- 
D. 5
Mathematics
The lengths of two vectors a and b, and the angle ? between them, are given. Find the length of their cross product, |a x b|.
 figure 1.png)
Mathematics
Find: a. The center and radius of the circle. b. The x- and y-intercepts of the graph of the circle.x2 + y2 + 2x - 2y - 4 = 0
A. a. center = (-1, 1); radius = 
b. (-1 + 
, 0), (0, 1 + 
)
B. a. center = (-1, 1); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 1 + 
), (0, 1 - 
)
C. a. center = (-1, -1); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 1 + 
), (0, 1 - 
)
D. a. center = (1, -1); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 1 + 
), (0, 1 - 
)
Mathematics
Graph the function.f(x) = x2 + 
A. 
B. 
C. 
D. 
Mathematics