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Maths Puzzle
cosec^4 A-2cosec^2 A+2sec^2 A-sec^4 A=cot^4 A-tan^4 A
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Book Other Question
sec^2 A+cosec^2 A=sec^2 A*cosec^2 A
A man brought 50 shares, each of nominal value Rs 100. After one year he received Rs 400 as dividend against them. Find the rate of dividend on his shares.