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सिद्ध करें कि((1-cosA)(1+cosA))/((1-sinA...

सिद्ध करें कि((1-cosA)(1+cosA))/((1-sinA)(1+sinA))=tan^(2)A. | 10 | त्रिकोणमितीय तादात्म्य और को...

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