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Mathematics, 23.08.2019 18:40 ashleyremon

Tan^2 a/1+cot^2 a + cot^2 a/1+tan^2 a=sec^2 a cosec^2 a-3

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Tan^2 a/1+cot^2 a + cot^2 a/1+tan^2 a=sec^2 a cosec^2 a-3...
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