Verify the identity.cos (x - y) - cos (x + y) = 2 sin x sin y
What will be an ideal response?
cos (x - y) - cos (x + y) = cos x cos y + sin x sin y - (cos x cos y - sin x sin y) = 2 sin x sin y.
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Find the circumference of the circle with the given radius or diameter.d = 7.94 cm
A. 49.89 cm B. 49.9 cm C. 24.94 cm D. 24.9 cm
Solve the problem.Maha checked the outside temperature at noon one day and found it was 28° C. At 10 PM when he checked, the outside temperature was 17° C. How much, in degrees Fahrenheit, did the temperature drop between noon and 10 PM?
A. -7.2°F B. 6.11°F C. -12.2°F D. 19.8°F
Use analytical methods to solve the equation.
= - 
A. No solution
B. - 
C. - 
D. - 
Provide an appropriate response.If the buyer is to pay a transportation charge, the following freight terms would be used:
A. FOB shipping point B. freight prepaid C. free on board D. FOB destination