Suppose cos x = 0 and cos(x+z)=1/2. Then...

Suppose `cos x = 0` and `cos(x+z)=1/2`. Then, the possible value (s) of z is (are).

A

`pi/6`

B

`(5pi)/(6)`

C

`(7pi)/(6)`

D

`(11pi)/(6)`

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The correct Answer is:

A, B, C, D

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