Prove that the tangents drawn at the ends of a chord of a circle make equal angles with the chord...

Prove that the tangents drawn at the ends of a chord of a circle make equal angles with the chord.
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[jarulpatra]

Sir can’t we do like - EXTernal point se tangents are equal so ab = ac since this is possible then angle b at chord and angle c at chord are equal because angles opposite to equal sides of triangle if we take abc as triangle ? 2:18

[saketshiv]

Sir angles opposite to equal sides are equal k criteria se bhi toh sove ho sakti hai isoceles triangle method se