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Calculate the direction cosines of the s...

Calculate the direction cosines of the sides of the triangle whose vertices are A(4, 5, 0), B(2, 6, 2) and C(2, 3, -1).

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Direction cosines of the side AB, BC and CD `-2/3, 1/3, 2/3; 0, -1/sqrt(2), -1/sqrt(2)` and `2/3, 2/3, 1/3` respectively.
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CHHAYA PUBLICATION-DIRECTION COSINES AND DIRECTION RATIOS-Exercise 3 : Short Answer Type Questions
  1. A line makes an acute angle with the positive direction of x-axis and ...

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  2. A straight line in the xy-plane makes an angle pi/4 with y-axis. Find ...

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  3. Calculate the direction cosines of the sides of the triangle whose ver...

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  4. Using direction ratios show that the points P(2, 3, 4) Q(-1, -2, 1) an...

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  5. A staright line makes angles pi/4 and pi/3 with the positive direction...

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  6. If O is the origin and A(2, 3, 1), B(1, 1, -5) are two given points th...

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  7. Show that the staright line joining the points (-1, 0, -2) and (1, 3, ...

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  8. Prove that the straight line joining the points (4, 5, 0) and (5, 3, 3...

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  9. Calculating the angle of the triangle, prove that the points A(3, 4, -...

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  10. Find the acute angle between x-axis and the straight line joining the ...

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  11. Calculating direction ratios show that the triangle formed by joining ...

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  12. Straight lines OA and OB are drawn from the origin O, if the direction...

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  13. Find the coordinates of the foot of the perpendicular drawn from the p...

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  14. Determine the values of a and b for which the straight line joining th...

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  15. If the straight line joining the points (4, -3, 2) and (3, -1, 5) is p...

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  16. Find the acute angle between two straight lines whose direction number...

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  17. Let A(2, -3, -1), B(4, 5, 2), C(-3, 4, 1) and D(2, 3, 5) are four give...

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  18. Using direction ratios prove that the points (4, 2, -6), (5, -3, 1), (...

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  19. Using direction numbers show that points P(4, 7, 8) and Q(2, 3, 4), R(...

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  20. Let l(1), m(1), n(1) and l(2), m(2), n(2) be the direction ratios of t...

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