Provide an appropriate response.Which of the following expressions is equivalent to cos 
? I. cos 
II. cos 
III. cos
src="https://sciemce.com/media/4/ppg__10625191757__f1q76g7.jpg" alt="" style="vertical-align: -4.0px;" />IV. -cos 
A. I and IV
B. I and II
C. I and III
D. III and IV
Answer: C
Mathematics
src="https://sciemce.com/media/4/ppg__10625191757__f1q76g7.jpg" alt="" style="vertical-align: -4.0px;" />IV. -cos
A. I and IV
B. I and II
C. I and III
D. III and IV
Answer: C
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Find all the second order partial derivatives of the given function.f(x, y) = ex/y
A. 
= 
; 
= ex/y
; 
= 
= -ex/y
B. 
= 
; 
= -ex/y
; 
= 
= ex/y
C. 
= 
; 
= 
; 
= 
= 
D. 
= 
; 
= ex/y
; 
= 
= -ex/y
Use the vertical line test to determine if y is a function of x.
A. Function B. Not a function
Answer the question.Two angles q and r are complimentary. The angle s is supplementary to q. Write an equation showing the relationship between r and s.
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Solve the system by using the inverse of the coefficient matrix. 7x - 4y + 9z = 78-3x + 6y - 9z = -60-6x - 3y + 5z = 3
A. (5, -1, 6) B. (4, 1, 6) C. (1, 6, 1) D. (4, -1, -6)