ICSE Class 10 Answered
If cos(a-b)+cos(b-c)+cos (c-a)= -3?2 ; then prove that cos a +cos b+cos c+sin a +sinb +sinc=0
Asked by keshavendu35 | 17 Aug, 2018, 12:10: AM
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Answered by Sneha shidid | 17 Aug, 2018, 11:18: AM
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