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TS EAPCET (Engineering) Coordinate Geometry: Direction Cosines and Direction Ratios — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice TS EAPCET (Engineering) Coordinate Geometry: Direction Cosines and Direction Ratios in the app →A line is equally inclined to all three coordinate axes. Its direction cosines areDirection ratios 3, 4, 12 give direction cosines (positive sign)The direction cosines of a line with direction ratios 6, 2, 3 areA line joins (1, 2, 3) and (4, 6, 15). Its direction cosines areDirection ratios of the line through (1, 2, 3) and (3, 5, 9) can be taken asA line through the origin makes 60° with both the x and y axes. Its acute angle with the z-axis isReversing a directed line replaces its direction angles α, β, γ by theirTwo parallel lines have direction cosines that areDirection ratios are also known by the nameWhich triple is NOT a set of direction ratios of the line with ratios 1, 2, 3?For A(2, 3, -4) and B(1, -2, 3), direction ratios of AB can beThree points are collinear if the lines joining two pairs of them haveThe vector i + j + k makes an angle with the x-axis whose cosine isThe x-axis and the y-axis meet at an angle whose cosine isDirection cosine l for ratios a, b, c is given by l =For ratios 1, -2, -2, the direction cosines with positive first entry areAngles α, β, γ that a directed line makes with the axes are calledFor any line, sin²α + sin²β + sin²γ equals