Use reference angles to find the exact value of the expression. Do not use a calculator.cos 
A. 1
B. 0
C. -1
D. undefined
Answer: B
Mathematics
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Graph the hyperbola.25y2 - 36x2 = 900
A. 
B. 
C. 
D. 
Mathematics
Solve the equation by multiplying both sides by the LCD.
= 1 + 
A. {8} B. {-5, 8} C. {6, -8} D. {-6, 8}
Mathematics
Graph the inequality.y ? -x2 - 4x + 5
A. 
B. 
C. 
D. 
Mathematics
A triangle has vertices  figure 1.png)
. Use a determinant to find its area.
 figure 2.png)
Mathematics