sectita/costita-tantita/cottita
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Sec ¢ / Cos ¢ - tan ¢ / cot ¢
=> 1 / Cos ^2 ¢ - sin ¢ / Cos ¢ /cos ¢ / sin ¢
=> 1 / Cos ^2 ¢ - sin ^2 ¢ / Cos ^2 ¢
=> ( 1 - Sin ^2 ¢ ) / Cos ^2 ¢
=> cos ^2 ¢ / Cos ^2 ¢
=> 1.
=> 1 / Cos ^2 ¢ - sin ¢ / Cos ¢ /cos ¢ / sin ¢
=> 1 / Cos ^2 ¢ - sin ^2 ¢ / Cos ^2 ¢
=> ( 1 - Sin ^2 ¢ ) / Cos ^2 ¢
=> cos ^2 ¢ / Cos ^2 ¢
=> 1.
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