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OpenStudy (anonymous):
the length of the pojection of a line on a plane is 12 cm. if the length of the line is 18cm, find the angle it makes with the plane
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OpenStudy (raden):
|dw:1393805802278:dw|
OpenStudy (raden):
then use the defenition of cosine : cosθ = 12/18 cosθ = 2/3 solve for θ by take the arc(cos(2/3)) (use the calculator)
OpenStudy (anonymous):
thanks a lot :)
OpenStudy (raden):
yo;re welcome
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