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proving trigonometric identities (please show work!) 1+ COS A 9. (CSC A + Cot A) 1 - COS A 9, (cscA + cotA)2 _ 1+

proving trigonometric identities (please show work!)

1+ COS A 9. (CSC A + Cot A) 1 - COS A

9, (cscA + cotA)2 _ 1+ cosA cos A

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