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NCERT Class 12- Mathematics: Chapter β 11 Three Dimensional Geometry Part 11
Question 30:
If the directions cosines of a line are , then
(A)
(B)
(C)
(D)
Answer: (D)
Question 31:
The distance of the plane from the origin is
(A)
(B)
(C)
(D) None of these
Answer: (A)
Question 32:
The sine of the angle between the straight line and the plane is
(A)
(B)
(C)
(D)
Answer: (D)
Question 33:
The reflection of the point in the plane is
(A)
(B)
(C)
(D)
Answer: (D)
Question 34:
The area of the quadrilateral ABCD, where and , is equal to
(A)
(B)
(C)
(D)
Answer: (A)
Question 35:
The locus represented by is
(A) A pair of perpendicular lines
(B) A pair of parallel lines
(C) A pair of parallel planes
(D) A pair of perpendicular planes
Answer: (D)
Question 36:
The plane makes an angle with axis. The value of is equal to
(A)
(B)
(C)
(D)
Answer: (C)
Fill in the Blanks in Each of the Exercises 37 to 41
Question 37:
A plane passes through the points and . The equation of plane is ________.
Answer:
Question 38:
The direction cosines of the vector are ________
Answer: