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" If "|{:(sin 0 cos phi,,sin 0 sin phi,,...

`" If "|{:(sin 0 cos phi,,sin 0 sin phi,,cos 0),(cos 0 cos phi,, cos 0 sin phi,,-sin 0),(-sin 0 sin phi,,sin 0 cos phi,,0):}|`then

A

`Delta` is independent of `theta`

B

`Delta` is independent of `varphi`

C

`Delta` is a constant

D

`((d Delta)/(d theta))_(theta= ""^(pi)//2)= 0`

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