Prove the identiti : Cosec to the power 4 A - cosec to the power 2 A = cot to the power 4 A + cot to the power 2 A

ICSE Class 10 Answered

Prove the identiti :

Cosec to the power 4 A - cosec to the power 2 A = cot to the power 4 A + cot to the power 2 A

Asked by pratyakshajha.12 | 31 Mar, 2015, 08:03: PM

Expert Answer

cos e c to the power of 4 A minus cos e c squared A equals c o t to the power of 4 A minus c o t squared A L H S comma cos e c to the power of 4 A minus cos e c squared A equals cos e c squared A left parenthesis cos e c squared A minus 1 right parenthesis equals cos e c squared A. c o t squared A equals left parenthesis 1 plus c o t squared A right parenthesis. c o t squared A equals c o t squared A plus c o t to the power of 4 A equals c o t to the power of 4 A plus c o t squared A equals R H S

Answered by Prasenjit Paul | 01 Apr, 2015, 10:40: AM

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