Mark M. answered • 05/06/20
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If 7x + 3y = 0, then (0,0) lies on the line.. The point (3, -7) is also on the line.
Draw a right triangle in quadrant 4 with vertices (0,0), (3,0), and (3,-7). The right angle has vertex (3,0) and the hypotenuse lies along the line 7x + 3y = 0 and has length √[32 + 72] = √58. If θ is the acute angle of the triangle with vertex at (0,0), then cosθ = 3 / √58.
Mark M.
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3 sqrt 58 over 58 is equivalent to my answer
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05/07/20
Ilarya P.
Would it be squar root 58 over 3, or 3 sqrt 58 over 5805/06/20