ICSE Class 10 Answered
Prove that sin^2A+2cos^2A+3son^2A+4cos^2A+.....+89sin^2A+90cos^2A=2085
Asked by nitinkumarsingh.singh.75 | 23 Nov, 2015, 06:20: PM
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Answered by satyajit samal | 24 Nov, 2015, 11:42: AM
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