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The angle between the lines x cos alpha ...

The angle between the lines `x cos alpha + y sinalpha=a` and `xsinbeta- ycosbeta = a` is `(i) beta - alpha (ii) pi -alpha +beta (iii) pi/2+ beta+alpha (iv) pi/2- beta+ alpha`

A

`beta - alpha`

B

`pi + beta- alpha`

C

`pi/2 + beta + alpha`

D

`pi/2 - beta + alpha`

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The correct Answer is:
D
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