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المعادلات التفاضلية: Mathematics Tawjihi question with answer

A Tawjihi Mathematics question (التكامل) with the answer and worked steps.

From the Tawjihi question bank: Mathematics · التكامل

أجد قاعدة العلاقة التي ميل مماسها dydx=ycosx\frac{dy}{dx}=y\cos x وتمر بالنقطة (0,1)(0,1).

المعادلات التفاضلية

The answer

نفصل: dyy=cosxdx\frac{dy}{y}=\cos xdx. بالتكامل: lny=sinx+C\ln|y|=\sin x+C، أي y=Cesinxy=Ce^{\sin x}. من النقطة (0,1)(0,1): 1=Ce01=C e^0، إذن C=1C=1. الحل y=esinxy=e^{\sin x}.

Explanation

صياغة هندسية لمعنى المشتقة كميل مماس.

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