A point on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function of ?.(9, 12) Find cos ?.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the centroid of the region.
A. 
= 
, 
= - 
B. 
= - 
, 
= 
C. 
= 0, 
= 
D. 
= 
, 
= - 
Mathematics
Simplify the expression.
A. tan 8x B. tan (-2x) C. tan 2x D. tan (-15x)
Mathematics
Solve the problem.There are 7 women running in a race. How many first, second, and third place possibilities can occur?
A. 210 B. 343 C. 35 D. 21
Mathematics
Match the system of inequalities with a graph.4y - x ? 2,y + 3x ? 4,y ? 0
A. 
B. 
C. 
D. 
Mathematics