Establish the identity.cos(4u) = 2 cos2(2u) - 1
What will be an ideal response?
cos(4u) = cos[2(2u)] = 2 cos2(2u) - 1
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Perform the operation and give the answer in Hindu-Arabic form. src="https://sciemce.com/media/4/ppg__ttt0612191108__f1q178g6.jpg" alt="" style="vertical-align: 0.0px;" height="10" width="5" />
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A. 46
B. 22
C. 42
D. 26
A French restaurant offers a menu consisting of 4 different appetizers, 5 different salads, 3 different soups, 7 different main courses, and 8 different desserts. The restaurant offers different combinations of "fixed price dinners" on different days of the week.On Sundays, the "fixed price dinner" consists of a main course, a dessert, and any two of the other three types of items (i.e., appetizer and soup, or appetizer and salad, or soup and salad). Assuming you don't pass on any of these, how many "fixed price dinners" are possible on Sundays?
A. 2632 B. 2688 C. 1344 D. 3360 E. none of these
Solve the problem.Martha can rake the leaves in her yard in 2 hours. Her brother can do the job in 5 hours. How long will it take them to do the job working together?
A. 1
hr
B. 
hr
C. 
hr
D. 3
hr
Evaluate the function.f(x) = 
; Find f(-4).
A. 
B. - 
C. 
D. 