/sci/ - Science & Math » Thread #11064774

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Silly Math question

Anonymous Wed 16 Oct 18:23:05 2019 No.11064774 View Reply Original Report

Quoted By: >>11064846

This is a silly question , i'm a noob to maths so i want to ask, how is: cos a -cos^3 a = cos a (1-cos^2 a).

Anonymous

Anonymous Wed 16 Oct 2019 18:25:01 No.11064783 Report

Quoted By: >>11064838

this should go in the sqt, but just notice that $a(1+a^2) = a+a^3$ and just put in cosa for a.

Anonymous

Anonymous Wed 16 Oct 2019 18:43:21 No.11064838 Report

Quoted By:

>>11064783
Thank you mate, when i noticed it i felt dumb as a rock

Anonymous

Anonymous Wed 16 Oct 2019 18:44:53 No.11064846 Report

Quoted By: >>11064847 >>11066343

>>11064774
>sen
>tg
what country lmao

Anonymous

Anonymous Wed 16 Oct 2019 18:45:40 No.11064847 Report

Quoted By:

>>11064846
Spain

Anonymous

Anonymous Thu 17 Oct 2019 05:07:03 No.11066343 Report

Quoted By:

>>11064846
tg instead of tan is used in russia, too
I don't think muricans are in any position to mock others when it comes to notation. mm/dd/yyyy, what a great idea

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