Use the given function value(s), and trigonometric identities (including the cofunction identities), to find the indicated trigonometric functions.
?sin 30° = 
, cos 30° = 
?
?sin 60° and cos 60°
A. ?sin 60° = 2 and cos 60° = 
B. ?sin 60° = 
and cos 60° = 
C. ?sin 60° = 
and cos 60° = 
D. ?sin 60° = and cos 60° = 
E. ?sin 60° = and cos 60° = 2
Answer: D
Mathematics
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Solve.Find the union: {-4, -2, 3, 5} ? {3, 5, 7}.
A. {3, 5, 7} B. {-4, -2, 3, 5, 7} C. {-4, -2, 3, 5} D. {3, 5}
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Subtract. Write the answer in lowest terms.
A. 
B. 2
C. 440
D. 48
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A. 65 B. 75 C. 74 D. 76
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