A ladder rests against a wall at an angle 'α' to the horizontal. Its foot is pulled away from the wall through a distance 'a' so that it slides a distance 'b' down the wall making an angle 'β' with the horizontal. Show that :
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let length of ladder be c
substituing values of all cos' and sin's in proving eqtn
( (y/c)-((y+a)/c) ) / ( (x/c)-((b+x)/c) )
=(y-y+a)/(x-b-x)
=a/b
substituing values of all cos' and sin's in proving eqtn
( (y/c)-((y+a)/c) ) / ( (x/c)-((b+x)/c) )
=(y-y+a)/(x-b-x)
=a/b