Q 2379278116.     What is the angle between the lines `x +z =0`

`y =0` and `20x=15y =12z`?

NDA 2009 Paper 1 April
A

`cos^(-1) (1/5)`

B

`cos^(-1) (1/7)`

C

`sin^(-1) (1/5)`

D

`sin^(-1) (1/7)`

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