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CBSE Class 11-science Answered

cos ssquare pie/8+coa square 3pie/8+cos square 5pie/8+ cos square 7pie/8 =2
Asked by science field | 07 Sep, 2014, 08:17: PM
answered-by-expert Expert Answer
C o n s i d e r space t h e space l e f t space h a n d space s i d e space o f space t h e space g i v e n space e q u a t i o n : L. H. S equals cos squared straight pi over 8 plus cos squared fraction numerator 3 straight pi over denominator 8 end fraction plus cos squared fraction numerator 5 straight pi over denominator 8 end fraction plus cos squared fraction numerator 7 straight pi over denominator 8 end fraction space space space space space space space space space space space equals cos squared straight pi over 8 plus cos squared open parentheses straight pi over 2 minus straight pi over 8 close parentheses plus cos squared open parentheses straight pi over 2 plus straight pi over 8 close parentheses plus cos squared open parentheses straight pi plus straight pi over 8 close parentheses space space space space space space space space space space space equals cos squared straight pi over 8 plus open square brackets cos open parentheses straight pi over 2 minus straight pi over 8 close parentheses close square brackets squared plus open square brackets cos open parentheses straight pi over 2 plus straight pi over 8 close parentheses close square brackets squared plus open square brackets cos open parentheses straight pi plus straight pi over 8 close parentheses close square brackets squared space space space space space space space space space space space equals cos squared straight pi over 8 plus open square brackets sin straight pi over 8 close square brackets squared plus open square brackets sin straight pi over 8 close square brackets squared plus cos squared straight pi over 8 space space space space space space space space space space space equals cos squared straight pi over 8 plus sin squared straight pi over 8 plus sin squared straight pi over 8 plus cos squared straight pi over 8 space space space space space space space space space space space equals 1 plus 1 space space space space space space space space space space space equals 2 space space space space space space space space space space space equals R. H. S H e n c e space p r o v e d.
Answered by Vimala Ramamurthy | 08 Sep, 2014, 08:48: AM

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CBSE 11-science - Maths
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