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the set of equations lambdax-y+(cos 0) ...

the set of equations `lambdax-y+(cos 0) z=0,3x+y+2z=0`
(cos 0) x+y+2z=0 ,`0 le 0 lt 2 pi` has non-trivial solution (s)

A

for no value of `lambda` and `theta`

B

for all values of `lambda` and `theta`

C

for all values of `lambda` and only two values of `theta`

D

for only one value of `lambda` and all values of `theta`

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