Use the half-angle formulas to simplify the given expression.

A. 2 cos 1.6?
B. 2 cos 0.4?
C. 2 cos 0.4?
D. 4 cos 0.4?

Answer: B

Mathematics

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Solve.Given that loga11 = 2.398 and loga5 = 1.609, evaluate loga.

A. 4.007 B. -0.788 C. 1.49 D. 0.789

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Rationalize the denominator.

A.  -  
B.  +  
C.
D.  - 

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Use a graph to approximate the solutions to the equation within 0.1. 1x - 5 = -x2

A. 1.8, -1.8 B. 2.8, -1.8 C. 1.8, -2.8 D. 2.8, -2.8

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Solve the rational inequality and graph the solution set on a real number line. Express the solution set in interval notation. < 0

A. (-8, 1)

B. (-?, -8)

C. (-?, -8) or (1, ?)

D. (1, ?)

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