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Alvin tan
Alvin Tan

Mathematics chevron_right College chevron_right United Kingdom

How to do these

Date Posted: 6 years ago
Views: 431
Hi
Hi
6 years ago
Which question??
Alvin tan
Alvin Tan
6 years ago
I just need the answers for 6,7,8
Hi
Hi
6 years ago
Sry haha haven’t learn college math yet

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Lee Zhi Xian
Lee Zhi Xian's answer
51 answers (Tutor Details)
1st
The key is to realize that the dot product of the two unit normal vectors gives the cosine of the angle between the planes.
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Lee Zhi Xian
Lee Zhi Xian's answer
51 answers (Tutor Details)
Substitute the equation of the line into the equation of the plane to find the lambda value that gives a position vector satisfying both equations
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Lee Zhi Xian
Lee Zhi Xian's answer
51 answers (Tutor Details)
From the diagram, we see that the dot product of the unit normal vector and unit directional vector gives the sine of theta.
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Lee Zhi Xian
Lee Zhi Xian's answer
51 answers (Tutor Details)
Take the direction OA, AB and BF as the usual x y z directions and then work out the dot product of OF and AG
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Lee Zhi Xian
Lee Zhi Xian's answer
51 answers (Tutor Details)
Use the ratio theorem to find OM and ON first. Then find the modulus of MN to get it's length