A Four Meter Ladder Leans Against A Wall.If The Foot The Ladder Makes An Angle Of 80\Xc2\Xb0 With The Ground, How High Up The Wall Those The Ladder Re

A four meter ladder leans against a wall.if the foot the ladder makes an angle of 80° with the ground, how high up the wall those the ladder reach?

  Use
 \sin( \alpha )  =  \frac{opposite}{hypotenuse}  \\  \sin( {80}^{o} ) =  \frac{h}{4}   \\ h = 4 \sin( {80}^{o} )  \\ h = 3.94m

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