Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Differential Equations

Question:

The solution of the differential equation dy/dx=√(4-y2)  where (-2<y<2)

Options:

y= 2 sin(x +C)

y= 2 cos(x +C)

y= 2 tan(x +C)

y= 2 cot (x +C)

Correct Answer:

y= 2 sin(x +C)

Explanation:

The given differential equation is dy/dx=√(4-y2

separating the variable, we get:

dy/(√(4-y2) = dx

Now, integrating both sides of this equation, we get:

∫{dy/(√(4-y2)} = ∫dx

⇒sin-1 (y/2) = x + C

⇒ y= 2 sin(x +C)