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OpenStudy (anonymous):
the length of the projection of a line on a plane is 12 cm. if the length of the line is 18 cm, find the angle it makes with the plane
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OpenStudy (faiqraees):
\[\large\rm cos^{-1} \frac{projection}{orignial~length}\]
OpenStudy (faiqraees):
|dw:1455629437956:dw|
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