Use the sum-to-product formulas to rewrite the sum or difference as a product.
?
cos 3? + cos 8?
?
A. ?
B. ?
C. ?
D. ?
E. 
Answer: E
Mathematics
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Solve using addition/subtraction:
Mathematics
Perform the indicated operation.4 - 14
A. -18 B. 18 C. 10 D. -10
Mathematics
Use a graphing calculator to determine approximately the intervals on which the function is increasing, and on which f is decreasing.
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Mathematics
Subtract the polynomials.(-7x7 + 9x9 - 1 + 9x8) - (-3 + 5x8 + 2x9 - 4x7)
A. 11x9 + 14x8 - 11x7 + 2 B. 7x9 + 4x8 - 3x7 + 2 C. 7x9 + 14x8 - 11x7 - 4 D. 11x9 + 14x8 - 11x7 - 4
Mathematics