# maths

a ladder 15 meters long just reaches the top of a vertical wall. if the ladder makes an angle of 60 degrees with the wall. find the height of wall.....

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1. did you make a sketch?
if so, then you should see that
cos60° = height/15
height = 15cos60 = ...

BTW, that ladder is totally unsafe!!!!

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2. 7.5

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