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tan-1( 2x/1-x^2) + cot-1 1-x^2/2x^2) = pie/3
plz proove
tan-1(2x/(1-x2)=2tan-1x
cot-1((1-x2)/2x2)=tan-1(2x2/(1-x2))
use the formula: tan-1a + tan-1b =tan-1((a+b)/(1-ab))
now i have only 20 days to my board exams.... suggest some tricks and time management for phy. and chem..
regards
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