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The population of a village increases every year by 10% p.a. and before 1 year 100 people died because of diarrhoea. If the population of the village was 5000 before 3 years, find the present population of the village.
Friday, January 19, 2018
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Soln: Use formula: cos2A = 2cos^2(A) - 1 cos2A+1= 2cos^2(A) (1+cos2A)/2 = cos^2(A) i.e. cos^2(A) = (1+cos2A)/2
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