CBSE Class 12-science Answered
If sin-1[ 2a / (1+a^2) ] + sin-1[ 2b / (1+b^2) ] = 2tan-1x , prove that x = (a+b)/(1-ab)
Asked by Jerrin Thomas | 19 Apr, 2014, 09:04: PM
Expert Answer
Answered by | 20 Apr, 2014, 12:31: AM
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