State True or FalseIf x-y-z-2- then sin 2x-sin 2y-sin 2z-4cos xcos ycos z-

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Cos(A+B)Cos(A-B)

State True or...

Question

State True or False
If $x + y + z = π / 2$ , then $sin 2 x + sin 2 y + sin 2 z = 4 cos x cos y cos z$ .

True

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False

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x + y + z =

\frac{π}{2}

sin 2 x + sin 2 y + sin 2 z = 4 cos x cos y cos z

If $x + y = π + z$ , then $s i n^{2} x + s i n^{2} y - s i n^{2} z =$

x + y = π + z

{sin}^{2} x + {sin}^{2} y - {sin}^{2} z = 2 sin x sin y cos z

x + y + z = π / 2

{sin}^{2} x + {sin}^{2} y + {sin}^{2} z = 1 - 2 sin x sin y sin z

u = \sqrt{{sin}^{2} x + {sin}^{2} y + {sin}^{2} z}

\frac{\partial u}{\partial z}

(0, 0, \frac{π}{4}) = A

u = (x - y) (y - z) (z - x)

u_{x} + u_{y} + u_{z} = B

u = log (x^{3} + y^{3} + z^{3} - 3 x y z)

2 (\frac{\partial u}{\partial x} + \frac{\partial u}{\partial y} + \frac{\partial u}{\partial z})

(1, - 1, 3) = C

A, B, C

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