Tasks, etc-3.1
No. 1.3. Given four points A1(3;5;4); A2(5;8;3); A3(1;2;-2 ); A4 (-1;0;2). Make the equations: a) plane A1A2A3; b) straight A1A2; C) straight A4M; perpendicular to the plane A1A2A3; d) straight A3N; parallel to the line A1A2; d) the plane passing through the point A4; perpendicular to the line A1A2; Calculate: e) the sine of the angle between the line A1A4 and the plane A1A2A3; g) the cosine of the angle between the coordinate plane OHU and the plane A1A2A3;
No. 2.3. Find the distance from a point to a plane .
No. 3.3. Make an equation of a straight line passing through the point M (1;-3;3) and forming angles 60, 45 and 120 with the coordinate axes, respectively.

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