Match the graph to one of the polar equations. 
A. r = 2 cos ?
B. r = 2 sin ?
C. r sin ? = 1
D. r = 1
Answer: A
Mathematics
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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.csc ? = -
, cos ? > 0Find sin 
.
A. 
B. - 
C. 
D. 
Mathematics
Find the exact value for x in the interval 
that satisfies the equation. cos (x) = 
A. 
B. - 
C. - 
D. 
Mathematics
Graph the parabola and label the vertex. Find the x-intercept.x = -3(y + 6)2 - 2
A. vertex (2, -6), x-intercept (-110, 0)
B. vertex (-2, -6), x-intercept (-106, 0)
C. vertex (-2, -6), x-intercept (106, 0)
D. vertex (2, -6), x-intercept (110, 0)
Mathematics
Express the sum using summation notation.
+ 
+ 
... + 
A. 
B. 
C. 
D. 
Mathematics