Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.cos 
A. - 
B. - 
C. 
D. 
Answer: B
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Solve the problem.Two forces, of 52.0 and 51.7 lb, forming an angle of 165.6°, act at a point in the plane. Find the magnitude of the resultant force.
A. 13.0 lb B. 103.7 lb C. 2603.9 lb D. 102.9 lb
Name the property used to go from step to step indicated by an a), b), c), or d).
What will be an ideal response?
Solve the problem.The minimum length L of a highway sag curve can be computed by L = 
,where ?1 is the downhill grade in degrees (?1< 0°), ?2 is the uphill grade in degrees (?2> 0°), S is the safe stopping distance for a given speed limit, h is the height of the headlights, and ? is the alignment of the headlights in degrees. Compute L for a 55-mph speed limit, where 
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and 
Round your answer to the nearest foot.
A. 601 ft
B. 634 ft
C. 651 ft
D. 617 ft
Determine if the ordered pair is a solution to the given linear inequality in two variables.2x + 3y ? -3
(3, 6)
A. Yes B. No