The manner in which human activities are causing the depletion in the Ozone and increase in the levels of carbon dioxide and other harmful gases,our planet will soon become uninhabitable. What immediate steps do you suggest we taken by our friends and family to put a stop to the situation immediately.
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If tan 2A = cot (A - 18°), where 2A is an acute angle, then the value of A is 36°.
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