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junior college 1 | H2 Maths
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Dreamer
Dreamer

junior college 1 chevron_right H2 Maths chevron_right Singapore

Help me with this 2 qns i need a detailed answer

Date Posted: 2 years ago
Views: 470
Eric Nicholas K
Eric Nicholas K
2 years ago
Kindly remind me to help you with the remainder of Q2 at a later time or on a later day as I am quite tired now and I might wake up not remembering this question.

For part (ii), I give you an idea first; you need to find the normal to the plane ADC in a similar way. The acute angle between the two planes is essentially the acute angle between their two normals. We proceed to use the definition of the dot product once you have obtained the direction vectors of the two normals.

For part (iii), you must realise that the intersection between any two non-parallel planes will always be a single line. It is, in fact, quite obvious here that AC will be the line of intersection between both planes. Usually, for intersection of planes, the line to find is not so straightforward.

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Eric Nicholas K
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5997 answers (Tutor Details)
1st
One possible approach to do Q1a
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Eric Nicholas K
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Alternative method for Q1a
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Eric Nicholas K
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5997 answers (Tutor Details)
Something like this would be good for Q1b.
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Eric Nicholas K
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A rough idea for Q1c
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Eric Nicholas K
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A rough idea which you can use for Q2i
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Eric Nicholas K
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Rough idea for the remaining parts