Use identities to find the indicated value for each angle measure.cos 2? = 
and ? terminates in quadrant III
Find cos ?.
A. cos ? = - 
B. cos ? = - 
C. cos ? = 0
D. cos ? = 
Answer: B
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Find the missing parts of the triangle. 
If necessary, round angles to the nearest degree and give exact values of side lengths.
A. B = 90°, C = 60°, b = 6
B. no such triangle
C. B = 60°, C = 90°, b = 6
D. B = 60°, C = 90°, b = 6
Solve.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Refer to the figure and determine the height, h, of the outside walls.A = 6 m
A. 2.9 m B. 69 m C. 8.6 m D. 8.3 m
Solve the problem.An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 8 hours. How long would it take the experienced accountant working alone?
A. 4 hr B. 16 hr C. 12 hr D. 20 hr
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.3 log5 2 + 
log5(r - 4) - 
log5 r
A. log5 
B. log5 
C. log5 
D. log5 