Find the exact value under the given conditions.sin ? = - ,   < ? < 2?; tan ? = - ,   < ? < ?Find cos (? + ?).

A.
B.
C. - 
D. - 


Answer: D

Mathematics

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Find the period of the function.y = 4 cos x

A.
B. ?
C. 4
D. 2?

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Answer the question about percent. Round your answer to the nearest tenth of a percent, if necessary.What percent of 50 is 516?

A. 103.2% B. 1032.0% C. 0.1% D. 1.0%

Mathematics

For the given functions f and g, find the requested composite function.f(x) = x2 - 8, g(x) = x2 - 6;Find the function f ? g.

A. x4 + 58 B. x4 - 12x2 + 28 C. x4 + 28 D. x4 - 16x2 + 58

Mathematics

Evaluate the square root.

A.
B. 3
C. 8
D.

Mathematics