KAMP
Fisika => Mekanika Klasik => Topik dimulai oleh: trfrm pada Juli 20, 2018, 11:25:35 AM
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Excuse me ... .
(http://i1135.photobucket.com/albums/m630/trans12/flying_object.png)
$\displaystyle\tan\theta=\frac{h}{x}$ ... .
$\displaystyle\sec^2\theta\frac{d\theta}{dt}=-\frac{h}{x^2}\frac{dx}{dt}$ ... .
$\displaystyle\frac{d\theta}{dt}=-\frac{h}{x^2}\frac{dx}{dt}\cos^2\theta=-\frac{h}{x^2}\frac{dx}{dt}\frac{x^2}{x^2+h^2}=-\frac{h}{x^2+h^2}\frac{dx}{dt}$ ... .
http://www.thescienceforum.com/mathematics/33957-related-rates.html#post399151