A ladder rests against a vertical wall at an inclination x to the horizontal . Its foot is pulled away from the wall through a distance p, so that its upper end slides a distance q down the wall and then the ladder makes an angle y to the horizontal . show that p÷q=cosβ -cosα ÷sinα -Sinβ
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Its foot is pulled away from the wall through a distance p, so that its upper end slides a distance q down the wall and then the ladder makes an angle y to the horizontal . show that p÷q=cos y-cos x÷sin X
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