Use a sum-to-product identity to rewrite the expression.sin (9t + 9) + sin (2t + 1)
A. 2 cos 
sin 
B. 2 sin 
sin 
C. 2 cos 
cos 
D. 2 sin 
cos 
Answer: D
Mathematics
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Find the domain of x in the expression.
?
?
A. 
B. 
C. 
D. 
E. 
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Find a formula for the nth term of the sequence.The sequence 0, 2, 0, 2, 0, . . . (alternating 0's and 2's)
A. an = 1 + (-1)n+1 B. an = 1 + (-1)n C. an = 1 + (-1)n-1 D. an = 1 - (-1)n
Mathematics
Find an equation for the surface obtained by rotating the parabola y=3x² about the y-axis.
What will be an ideal response?
Mathematics
Use your grapher to graph: f (x) = x3 ? 4x2 + 2x ? 3.
Then sketch the graph below.
Mathematics