ICSE Class 10 Answered
cosecA+cotA =1/cosecA-cotA
Asked by kajal | 02 Oct, 2013, 10:44: AM
Expert Answer
LHS
= cosecA+cotA
= (cosecA+cotA) (cosecA-cotA) / (cosecA-cotA)
= (cosec2A-cot2A) / (cosecA-cotA)
= 1/ cosecA - cotA [Using the identity 1+cot2A = cosec2A]
= RHS
Answered by | 02 Oct, 2013, 12:01: PM
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