Use the given triangles to evaluate the expression. Rationalize all denominators. 
cos 45°
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve the problem. Round to one decimal place if needed.A flagpole casts a shadow of 25 feet. Nearby, a 3-foot tree casts a shadow of 2 feet. What is the height of the flagpole?
A. 0.2 ft B. 37.5 ft C. 16.7 ft D. 150 ft
Mathematics
Subtract the polynomials.(-18x - 14) - (-20x - 10)
A. -38x - 24 B. 2x - 4 C. 2x - 24 D. -2x
Mathematics
Write the first four terms of the sequence whose general term is given.an = n - 6
A. -6, -5, -4, -3 B. -24, -18, -12, -6 C. -5, -4, -3, -2 D. 1, 2, 3, 4
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = - 
, csc ? > 0Find sin (2?).
A. 
B. 
C. 
D. - 
Mathematics