Use the product-to-sum identities to rewrite the expression as the sum or difference of two functions.cos 6? cos 5?
A. 
cos 11? - 
sin ?
B. 
cos 11? - 
cos ?
C. cos2 30?2
D. 
cos ? + 
cos 11?
Answer: D
Mathematics
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Solve the equation.3(r - 3) + 4(r - 2) = -2(r - 6) + 10(r + 2)
A. r = –57 B. r = –54 C. r = –49 D. r = –46 E. r = –44
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Make the following time conversion.0.8 hours to seconds
A. 48 sec B. 1600 sec C. 2880 sec D. 324 sec
Mathematics
Give an appropriate answer.Using the following graph, find an Euler circuit that begins and ends with vertex B.
A. B ? C ? D ? E ? F ? A ? B ? D ? F ? B B. B ? C ? D ? E ? F ? A ? B ? C ? D ? B ? F ? D ? B C. No Euler circuit exists. D. B ? A ? F ? E ? D ? C ? B
Mathematics
Evaluate.4 ? 7 - 82
A. -36 B. 224 C. 420 D. 36
Mathematics