3d Trig! (1 Viewer)

[magik22]

Does anyone know a method on how to tackle a 3D trig question ESPECIALLY when there is no diagram given. Like is there a way or method that makes it easier to interpret the question?

I'm finding it so difficult to draw the diagram out properly to begin with before I can even answer to question. =.=

thx everyone.

 

[Timothy.Siu]

well u follow the instructions and draw it...thats the only way really

 

[gurmies]

if you have trouble drawing the diagram, try this. Draw a set of axis as if you were doing co-ordinate geometry. The x-axis remains perfectly horizontal, but the y-axis should be tilted to the right at about a 45 degree inclination. From the "origin" draw a perfectly vertical line. Now you have an easy to visualise 3-D diagram which you can label accordingly. Personally, this part of trigonometry usually loses me as well, but the more of them you do, they easier they become - there are only so many types of questions they can ask. If you need more explanation, i'll try provide a diagram.

NOTE: If there are bearings involved be sure to label the north, which will be slightly tilted!

 

[youngminii]

if you have trouble drawing the diagram, try this. Draw a set of axis as if you were doing co-ordinate geometry. The x-axis remains perfectly horizontal, but the y-axis should be tilted to the right at about a 45 degree inclination. From the "origin" draw a perfectly vertical line. Now you have an easy to visualise 3-D diagram which you can label accordingly. Personally, this part of trigonometry usually loses me as well, but the more of them you do, they easier they become - there are only so many types of questions they can ask. If you need more explanation, i'll try provide a diagram.

NOTE: If there are bearings involved be sure to label the north, which will be slightly tilted!

This.
Also, draw the triangles seperately, (AS WELL) so that you have a clearer understanding
I always get confused with the right angled parts until I seperately draw the triangles, usually ends up with 2 vertical plane and 1 horizontal (ie. two up-3d and one flat-2d). Makes it that much easier

 

[gurmies]

This.
Also, draw the triangles seperately, (AS WELL) so that you have a clearer understanding
I always get confused with the right angled parts until I seperately draw the triangles, usually ends up with 2 vertical plane and 1 horizontal (ie. two up-3d and one flat-2d). Makes it that much easier

Yep, that helps as well!

 

[Timothy.Siu]

also, try to draw the diagram roughly to scale so ur angles/bearings dont look messed up and trick you
happens a lot to me sometimes...like drawing 500m shorter than 300m.