Find the exact value of the expression.cos (60° + 45°)
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Evaluate the expression.-73
A. 21 B. -21 C. -343 D. 343
Mathematics
Find all solutions.8x3 + 64x2 + 120x = 0
A. {0, -3, -5}
B. {-3, -5}
C. 
D. {0, 3, 5}
Mathematics
Graph the function over a one-period interval.y = 
cos 2 
A. 
B. 
C. 
D. 
Mathematics
Find f[g(x)] and g[f(x)].f(x) = 7/(x)4; g(x) = 2x3
A. f[g(x)] = 7x12/686 g[f(x)] = x12/16 B. f[g(x)] = 7/16x12 g[f(x)] = 686/(x)12 C. f[g(x)] = 686/7x12 g[f(x)] = 16/(x)12 D. f[g(x)] = 7x12/16 g[f(x)] = x12/686
Mathematics