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The acute angle between intersecting lines that do not cross at right angles is the same as the ...
The acute angle between intersecting lines that do not cross at right angles is the same as the angle determined by vectors normal to the lines or vectors parallel to the lines. Use this fact and knowledge of orthogonal and parallel vectors to find the acute angle between the lines 5x?8y=8 and x?y=5 The measure of the angle between the lines is radians. (Type an integer or decimal rounded to two decimal places as needed.)