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CBSE Class 10 Answered

SecA-1/secA+1=1-cosA/1+cosA Prove
Asked by Kshipra.nks | 01 Nov, 2018, 06:16: AM
answered-by-expert Expert Answer
begin mathsize 16px style space fraction numerator sec space straight A space minus 1 over denominator sec space straight A space plus space 1 end fraction space equals space space fraction numerator 1 minus space cos space straight A over denominator 1 space plus space cos space straight A end fraction
straight L. straight H. straight S space equals space fraction numerator sec space straight A space minus 1 over denominator sec space straight A space plus space 1 end fraction space equals space fraction numerator begin display style 1 over cosA end style space minus space 1 over denominator 1 over cosA space plus space 1 end fraction space equals space fraction numerator 1 minus space cosA over denominator 1 space plus space cosA end fraction space equals space straight R. straight H. straight S end style
Answered by Yasmeen Khan | 01 Nov, 2018, 10:25: AM
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