Consider the following statements : Statement I : If the line segment joining the points P (m, n) and Q (r, s) subtends an angle α at the origin, then cos α = (mr + ns – nr)/(√(m² + n²)(r² + s²)) Statement II : In any triangle ABC, it is true that a² = b² + c² – 2bc cos A. Which one of the following is correct in respect of the above two statements ?

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