Solve the equation: cos –1 a/x–cos –1 b/x =cos –1 1/a

Question

Philoid · Accepted Answer

Given:-

Take

⇒

We know that, Formula

Thus,

⇒

Squaring both side or removing square root, we get

⇒

⇒ (b² – a²)a²b² = x²(b² – a²)

⇒ x² = a²b²

⇒ x = ab