If the plane ax+by=0 is rotated about its line of intersection with th – InterviewSolution

1.	If the plane ax+by=0 is rotated about its line of intersection with the plane z=0 through an angle α,then prove that the equation of the plane in its new position is ax+by±(√a2+b2tanα)z=0.
Answer» If the plane ax+by=0 is rotated about its line of intersection with the plane z=0 through an angle $α$ ,then prove that the equation of the plane in its new position is $a x + b y \pm (\sqrt{a^{2} + b^{2}} t a n α) z = 0.$

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