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यदि `angleA` व `angleB` दो न्यूनकोण एक प्रकार है कि `cos A=cos B, ` तब सिद्ध कीजिए कि ` angleA=angleB.`

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दिया है कि `angle A `व `angleB` न्यूनकोण है
तब `angleC=90^(@)`
तथा `cosA=cosB` (दिया है)
`implies(AC)/(AB)=(BC)/(AB)`
`impliesAC=BC`
`because` समान भुजाओ के विपरत कोण भी बराबर हॉट अहा इसलिए
`angle A=angleB`
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