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त्रिकोणमितीय सर्वसमिकाओं को सिद्ध करो : ...

त्रिकोणमितीय सर्वसमिकाओं को सिद्ध करो :
`((1+ sin theta)^(2)+(1-sin theta)^(2))/(2 cos ^(2) theta)=(1+sin ^(2)theta)/(1-sin theta)`

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