Find the particular solution for the following differential equation: , given that
Find the particular solution for the following differential equation:
$\sqrt{1 - y^2} \, dx = (\sin^{-1} y - x) dy$, given that $y(0) = 0$
Answer
Answer
AIWritten by AI (gemini-2.5-pro) - it can contain mistakes.
Rewrite as:
$\frac{dx}{dy} + \frac{1}{\sqrt{1 - y^2}} x = \frac{\sin^{-1} y}{\sqrt{1 - y^2}}$.
This is a linear differential equation in $x$ with integrating factor:
$I.F. = e^{\int \frac{1}{\sqrt{1 - y^2}} dy} = e^{\sin^{-1} y}$.
The general solution is:
$x e^{\sin^{-1} y} = \int e^{\sin^{-1} y} \frac{\sin^{-1} y}{\sqrt{1 - y^2}} dy + C = (\sin^{-1} y - 1)e^{\sin^{-1} y} + C$.
$x = \sin^{-1} y - 1 + C e^{-\sin^{-1} y}$.
Given $y(0) = 0$ (i.e. $y = 0$ when $x = 0$):
$0 = \sin^{-1}(0) - 1 + C e^0 \implies C = 1$.
Hence, the particular solution is $x = \sin^{-1} y - 1 + e^{-\sin^{-1} y}$.
From ISC 2026 Mathematics Paper 1, question 14(ii).