find the value of x when 2x²+4=0
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the angle of elevation of a cloud from point h meters above the surface of a lake is theta and angle of depression of it's reflection in the lake is peta prove that the height of the cloud above the lake surface is:- h[ tan peta + tan theta ÷ tan peta - tan tan theta] please solve this question I need it urgently. anyone can solve and give the right answer. right answer will be marked as...