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junior college 1 | H2 Maths
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tan
Tan

junior college 1 chevron_right H2 Maths chevron_right Singapore

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Date Posted: 2 years ago
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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
First part

The key takeaway here is to know that a zero scalar product between two vectors implies that the two vectors are perpendicular to each other. This applies to both two- and three- dimensional vectors.
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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
Second part

You will need to know the definition of the dot product (involving cosine of an included angle) as well as some old trigonometric stuffs in the O Level syllabi.