Question
What is the significance of celebrating World Ozone Day
on 16th September each year?Solution
Explanation: World Ozone Day is celebrated on 16th September each year to commemorate the signing of the Montreal Protocol, which is an international environmental treaty aimed at phasing out the production and consumption of Ozone Depleting Substances (ODS). This treaty came into force on this day in 1987.
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(tan 5x - tan 3x - tan 2x) = ?
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