Question

XY * YZ * ZX is equal​

Answer 1

Answer:

X square y square z square

Answer 2

Answer:

Given, x=ycos

3

2π

=zcos

3

4π

x=

2

−y

=

2

−z

Thus, xy+yz+zx=x(−2x)+(−2x)(−2x)+(−2x)(x)

= −2x

2

+4x

2

−2x

2

= 0

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