/sci/ - Science & Math » Thread #10994240

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Anonymous Sun 22 Sep 18:45:38 2019 No.10994240 View Reply Original Report

Quoted By: >>10994252

How would I solve this. What do I do after I find r'(t)? Do I multiply it with r(t)?

Anonymous

Anonymous Sun 22 Sep 2019 18:48:35 No.10994252 Report

Quoted By: >>10994294

>>10994240
No need for r'. Just dot r with i-j and set it to zero, and use the smallest positive t that satisfies this.

Anonymous

Anonymous Sun 22 Sep 2019 18:49:42 No.10994257 Report

Quoted By: >>10994294

Has nothing to do with r'. They ask for r * (i-j) = 0. Assuming i,j and k are othorgonal, that's 2-4sin(t/2)=0, or t=2*arcsin(1/2).

Anonymous

Anonymous Sun 22 Sep 2019 19:03:08 No.10994294 Report

Quoted By:

Anonymous

Anonymous Sun 22 Sep 2019 19:18:52 No.10994339 Report

Quoted By:

$t=\dfrac{\pi}{3}$

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