prove that: 1/cosecA-cotA+1/cosecB-cotB+ 1/cosecC-cotC=cosecA+cosecB+cosecC+cotA+cotB+cotC

Asked by  | 11th Sep, 2012, 09:23: PM

Expert Answer:

Answered by  | 12th Sep, 2012, 10:16: AM

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