Use the product-to-sum formulas to rewrite the product as a sum or difference.
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?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: D
Mathematics
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Refer to the right triangle ABC with C = 90°.Assuming that a = 6 and c = 10, find b.
A. 5 B. 8 C. 7 D. 9
Mathematics
Perform the indicated operation and simplify. Write the answer in the form a + bi.2i ? 11i
A. 22 B. -22 C. -22i D. 22i
Mathematics
Find the indefinite integral.
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A. 
B. 
C. 
D. 
Mathematics
Find the vertex, focus, and directrix of the parabola with the given equation.(y + 1)2 = 16(x + 2)
A. vertex: (2, 1) focus: (6, 1) directrix: x = -2 B. vertex: (-2, -1) focus: (2, -1) directrix: x = -6 C. vertex: (-2, -1) focus: (-6, -1) directrix: x = 2 D. vertex: (-1, -2) focus: (3, -2) directrix: x = -5
Mathematics