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सिद्ध कीजिए कि- (1)/(sec A - tanA) - (...

सिद्ध कीजिए कि-
`(1)/(sec A - tanA) - (1)/(cos A) = (1)/(cos A) - (1)/(sec A + tan A)`

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(1)/(sec A-tan A)-(1)/(cos A)=(1)/(cos A)-(1)/(sec A+tan A)

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(1 + sec A + tan A) (1-cos eA + cot A) = 2