The lines x cos α + y sin α = p1 and x cos β + y sin β = p2 – McqOptions

MCQOPTIONS

1.	The lines x cos α + y sin α = p1 and x cos β + y sin β = p2 will be perpendicular if
A.	α = β
B.	\(\|\alpha - \beta \|=\dfrac{\pi}{2}\)
C.	\(\alpha = \dfrac{\pi}{2}\)
D.	\(\alpha \pm \beta = \dfrac{\pi}{2}\)
Answer» C. \(\alpha = \dfrac{\pi}{2}\)

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