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junior college 1 | H2 Maths
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junior college 1 chevron_right H2 Maths chevron_right Singapore

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Date Posted: 4 years ago
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Boy Mow Chau
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317 answers (Tutor Details)
1st
for (i), we use the fact that any line that lies within the plane p, will be perpendicular to the normal of plane p.