A ladder rests vertically against a wall in an inclination to the horizontal. It’s foot is pulled away from the wall through the dis of P so that it’s upper end slides a distance q down the wall and then the ladder makes an angle b to the horizontal. Show that p/q= cosA-cosB/sinB-sinA?
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Answer:
cosA-cosB=p
sinA-sinB=q
cotA-cotB=cosA-cosB/sinA-sinB
p/q=cosA-cosB/sinA-sinB
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