Find the sum and simplify the answer.
+ 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use an appropriate identity to find the exact value of the expression.cos 
A. 
+ 
B. 
C. 
D. 
- 
Mathematics
Find the product.(p - r)(p + r)
A. p2 - r2 B. 2p2 - r2 C. p2 - 2r2 D. p2 + r2
Mathematics
Graph the equation. Identify the coordinates of the vertex.y = x2 - 5x + 1
A. 
B. 
C. (2, -9)
D. (0, 1)
Mathematics
Give the amplitude or period as requested.Amplitude of y = 2 sin 
x
A. 2
B. 
C. 
D. 6?
Mathematics