Vectors AS maths

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#1
The question is asking to find the angle made with the positive x axis. Wouldn’t it be the one i drew. The worked out answer shows a different angle. Could be somebody plz explain that to me. I’ll attach screenshots and the pictures. Thanks.
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#2
Thanks
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1 month ago
#3
(Original post by Tanyme)
The question is asking to find the angle made with the positive x axis. Wouldn’t it be the one i drew. The worked out answer shows a different angle. Could be somebody plz explain that to me. I’ll attach screenshots and the pictures. Thanks.
Its as per the model solution. The origin is at 0i+0j and 6i+0j would make a 0 degree angle with the positive x-axis as the i vector is aligned with the x axis. 0i+8j would make a 90 degree angle with the positive x-axis as its aligned with the positive y axis.
6i+8j would make an angle atan(4/3) above the x-axis
6i-8j would make an angle atan(4/3) below the x-axis.
Last edited by mqb2766; 1 month ago
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1 month ago
#4
You started from the wrong position

1. Start from the origin. So you go 6 units to the right and 8 units down right?

So its at the positive x-axis. The one you drew is in the negative x-axis which is not correct

2. Then you measure the angle it makes to the positive x-axis which is shown in the solutions too(Cause it touches the positive x-axis even if its below the x-axis)
Last edited by Goldenknight; 1 month ago
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