Question

P a 1/q , p=6 and q = 20 . Find q, is 4

Answer 1

Answer:

Step-by-step explanation:

Let P(3,4,5) Q(4,6,3) R(−1,2,4) and S(1,0,5) be any four points.

The dr's of the line PQ are (1,2,−2)

The dr's of the line RS are (2,−2,1)

The projection of RS on PQ will be RS×cosθ

RScosθ =  

∣PQ∣

PQ×RS

​  

 

               

=  

3

(i+2j−2k).(2i−2j+k)

​  

   =  

3

4

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