Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(1) = 4, u '(1) = -7, v(1) = 7, v '(1) = -4.
(2u - 4v) at x = 1
A. -20
B. 36
C. -30
D. 2
Answer: D
Mathematics
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B. 
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Given that ? is an angle in standard position whose terminal side contains the given point, provide the exact value of the indicated function.(2, -1); cos ?
A. 
B. 
C. - 2
D. 
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Find the values of x for which the expression is a real number.
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B. 
C. 
D. 
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Express the product as a sum containing only sines or cosines.sin(7?) cos(3?)
A. 
[sin(10?) + cos(4?)]
B. 
[cos(10?) - cos(4?)]
C. sin cos(21?2)
D. 
[sin(10?) + sin(4?)]
Mathematics