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Most users ever online was 11 on Mon Nov 17, 2014 1:04 pm
3D trig problem
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Re: 3D trig problem
Wait what do we have to find?
Thimodya/Waspinator Posts : 10
Points : 10
Join date : 20101003
Re: 3D trig problem
okay i think i got it my answer was 59 degrees
i dont think theres any need for codecogs here so ill jst type it directly:
firstly i took the square base and found AC which is 18.526 i used Pythagoras for this by spliting the square base and then acting like it was a right angled triangle
next i found VED by dividing 18.526 by 2 (9.263) to get another right angled triangle but this time its vertical.
i no the side VD is 18.2
and the side ED is 9.263
so then its adjacent over hypotenuse so its Cos
so cos = 9.263/18.2
cos=0.5089
cos^1(0.5089)
this equals the angle from the edge of the square to the base of the triangle
59.405 but to give it to the closest degrees
59 degrees
maybe i shuld have used codecogs :s
anyways that was fun
i dont think theres any need for codecogs here so ill jst type it directly:
firstly i took the square base and found AC which is 18.526 i used Pythagoras for this by spliting the square base and then acting like it was a right angled triangle
next i found VED by dividing 18.526 by 2 (9.263) to get another right angled triangle but this time its vertical.
i no the side VD is 18.2
and the side ED is 9.263
so then its adjacent over hypotenuse so its Cos
so cos = 9.263/18.2
cos=0.5089
cos^1(0.5089)
this equals the angle from the edge of the square to the base of the triangle
59.405 but to give it to the closest degrees
59 degrees
maybe i shuld have used codecogs :s
anyways that was fun
fergus Posts : 18
Points : 29
Join date : 20101003
Age : 107
HELP!!
what is meant by the plane angles!
Luka a.k.a GodOfRandom Admin
 Posts : 13
Points : 14
Join date : 20101003
Re: 3D trig problem
Uh........im not sure......but i think fergus did it correct
Thimodya/Waspinator Posts : 10
Points : 10
Join date : 20101003
does it answer the question
What angle are we looking for and does Fergus' solution answer the questions?
tip: mymaths!
tip: mymaths!
Admin Admin
 Posts : 62
Points : 71
Join date : 20101002
Re: 3D trig problem
ime not sure what the answer is but i believe the to find the answer you need to create a triangle intersecting the the middle of both planes since if you use the edges length of the pyramids triangle going to the corner you are not working out the planes angle but the corners angle to the base of the pyramid making this problem far more difficult however as i said ime not sure and could easily be wrong.
Luka a.k.a GodOfRandom Admin
 Posts : 13
Points : 14
Join date : 20101003
Re: 3D trig problem
I belive in luka
Btw i lost that sheet for hw...
If anyone has a scanner and a uncomplete hw sheet can u send me a scan?
Ty
Btw i lost that sheet for hw...
If anyone has a scanner and a uncomplete hw sheet can u send me a scan?
Ty
fergus Posts : 18
Points : 29
Join date : 20101003
Age : 107
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