If y = cos^-1(2x/(1+x^2)), then dy/dx is equal to
'-2/(1+x^2) for all |x| ≤ 1
'-2/(1+x^2) for all |x| > 1
2/(1+x^2) for all |x| < 1
None of the above
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy