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ICSE Class 10 Answered

(sinA + cosecA)2 + (cosA + secA)2 = 5 + sec2A x cosec2A
Asked by Yesan | 27 Jan, 2018, 05:30: PM
answered-by-expert Expert Answer
begin mathsize 16px style expanding
equals sin squared straight A plus cosec squared straight A plus 2 sinA space cosecA plus cos squared straight A plus sec squared straight A plus 2 secA space cosA
equals sin squared straight A plus cos squared straight A plus 2 plus 2 plus cosec squared straight A plus sec squared straight A
equals 5 plus cosec squared straight A plus sec squared straight A
equals 5 plus fraction numerator cos squared straight A plus sin squared straight A over denominator cos squared straight A. sin squared straight A end fraction
equals 5 plus cosec squared straight A. sec squared straight A end style
Answered by Arun | 28 Jan, 2018, 06:43: PM
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