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