1.

Two circles of radii a and b cut each other at an angle theta then length of common chord is

Answer»

`(2 AB SIN theta)/sqrt(a^(2) + B^(2) + 2AB COS theta )`
`(2ab sin theta )/sqrt(a^(2) + b^(2) - 2 ab cos theta ) `
`(2 ab cos theta )/sqrt(a^(2) + b^(2) + 2 ab cos theta )`
`(2 ab cos theta)/sqrt(a^(2) + b^(2) - 2 ab cos theta )`

Answer :A


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