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Mathematics 12 Online
OpenStudy (anonymous):

A ladder 15 feet long leans against a wall and forms an angle of 45° with the ground. How far from the wall is the ladder?

OpenStudy (anonymous):

Draw a picture and label the ground X, the wall Y, and do include the 45 degree angle. Next, use the fact that cos(45) = adjacent/hypotenuse. Or, cos(45) = x/15. Cross multiply, evaluate the value of cos(45), and solve for X. Ok?

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