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If the angle theta between Z-axis and t...

If the angle `theta` between Z-axis and the plane `3x-4y+5z+7=0 " is cos" ^(-1)(k),"then "k=`

A

`(1)/(2)`

B

`(1)/(sqrt(2))`

C

2

D

`sqrt(2)`

Text Solution

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The correct Answer is:
B
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