Establish the identity.sin
= -cos ?
What will be an ideal response?
sin 
= sin 
cos ? - cos 
sin ? = (-1) ? cos ? - 0 ? sin ? = - cos ?
Mathematics
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Find fx, fy, and fz.f(x, y, z) = x2y + y2z + xz2
A. fx = 2xy; fy = x2 + 2yz; fz = y2 + 2xz B. fx = 2y + z2; fy = x2 + 2z; fz = y2 + 2x C. fx = 2xy + z2; fy = x2 + yz; fz = y2 + xz D. fx = 2xy + z2; fy = x2 + 2yz; fz = y2 + 2xz
Mathematics
Find the inverse, if it exists, for the matrix.
A. 
B. The inverse does not exist.
C. 
D. 
Mathematics
Evaluate.
5
A. 
B. - 
C. 
D. - 
Mathematics
Find the vertex of the parabola.-2x2 + 20x - y - 54 = 0
A. 
B. 
C. (5, -4)
D. 
Mathematics