The altitude through vertex A of with position vectors of points A, B, C as respectively is
(A)
(B)Correct
(C)
(D)
Answer: (B)
Solution
The altitude from A to BC equals , and . $×=(Missing argument for \bar\bar b-Missing argument for \bar\bar a)×(Missing argument for \bar\bar c-Missing argument for \bar\bar a)=Missing argument for \bar\bar b×Missing argument for \bar\bar c-Missing argument for \bar\bar b×Missing argument for \bar\bar a-Missing argument for \bar\bar a×Missing argument for \bar\bar c+Missing argument for \bar\bar a×Missing argument for \bar\bar a=Missing argument for \bar\bar b×Missing argument for \bar\bar c+Missing argument for \bar\bar
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.