Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.sin ? = 
Find tan ?.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.The area of a triangle with vertices (x1, y1), (x2, y2), and (x3, y3) is 
,where the symbol ± indicates that the appropriate sign should be chosen to yield a positive area. Use this formula to find the area of a triangle whose vertices are (2, 10), (6, -4), and (-3, -9).
A. 2 B. 73 C. 1 D. 146
Mathematics
Solve.A boat goes 320 miles downstream in the same time it can go 240 miles upstream. The speed of the current is 9 miles per hour. Find the speed of the boat in still water.
A. 54 mph B. 72 mph C. 56 mph D. 63 mph
Mathematics
Prove the identity.cos 4u = cos2 2u - sin2 2u
What will be an ideal response?
Mathematics
Construct a probability model for the experiment.Rolling a 6-sided fair die once
What will be an ideal response?
Mathematics