Evaluate without using a calculator by using ratios in a reference triangle.cos (- 
)
A. - 
B. 
C. 
D. - 
Answer: A
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Solve the problem.Arrange 5 square tiles so that they make a solid pattern with the smallest perimeter possible. The tiles are equal in area and touch at least one other tile along an entire edge.
A. 
B. 
C. 
D. 
Graph the polar equation.r cos ? = -4
A. 
B. 
C. 
D. 
Solve the problem.A forest ranger at Lookout A sights a fire directly north of her position. Another ranger at Lookout B, exactly 2 kilometers directly west of A, sights the same fire at a bearing of N41.2°E. How far is the fire from Lookout A? Round your answer to the nearest 0.01 km.
A. 2.25 km B. 2.28 km C. 2.32 km D. 2.18 km
Solve the problem.Sue can sew a precut dress in 3 hours. Helen can sew the same dress in 2 hours. If they work together, how long will it take them to complete sewing that dress? Give your answer rounded to one decimal place, if necessary.
A. 2.5 hr B. 1.2 hr C. 5 hr D. 1.8 hr