Posted by Gabrielle on Thursday, April 7, 2011 at 5:09am.
A swing 5 metres long swings through a vertical angle of 50 degrees. Through what vertical distance does the seat rise in going from its lowest position to its highest?

Maths  MathMate, Thursday, April 7, 2011 at 9:22am
At the lowest point, the swing is 5m below the support.
At the halfvertical angle of 50, the swing is 5m*cos(25°) below the support.
So the vertical distance
= 5m*(1cos(25°)
Your calculator will give you the approximation to the exact answer.
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