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WBJEE: Important Questions and Preparation Tips – Three Dimensional Geometry

Jan 3, 2018 10:05 IST
    WBJEE 2018: Three Dimensional Geometry
    WBJEE 2018: Three Dimensional Geometry

    Engineering aspirants should try to focus only on the chapter notes when exams are around the corner. With the help of chapter notes they can easily cover all important concepts, formulae and previous year solved questions.

    In this article, engineering section of Jagranjosh brings to you chapter notes if chapter Three Dimensional Geometry after doing the detailed analysis of the previous year papers and latest syllabus of WBJEE entrance examination. About 2-3 questions are being asked from this topic in the examination.

    These chapter notes contain all important topics related to Three Dimensional Geometry like direction cosines, direction ratio, relation between the direction cosines, relation between direction cosines and direction ratio, vector equation of a line, Cartesian equation of a line passing through two points, distance between two parallel lines, equation of a plane, condition for coplanar planes, distance of a point from a plane etc.

    Solutions of some previous year questions are explained very clearly by Subject Experts of Mathematics.

    WBJEE: Important Questions and Preparation Tips – Limits

    Important Concepts:

    WBJEE Three Dimensional Geometry

    WBJEE Three Dimensional Geometry

    WBJEE: Important Questions and Preparation Tips – Parabola

    Some previous years solved questions are given below:

    Question 1:

    WBJEE Three Dimensional Geometry Q1

    Solution 1:

    WBJEE Three Dimensional Geometry S1

    Hence, the correct option is (b).

    WBJEE: Important Questions and Preparation Tips – Circles

    Question 2:

    WBJEE Three Dimensional Geometry Q2

    Solution 2:

    WBJEE Three Dimensional Geometry S2

    Hence, the correct option is (c).

    WBJEE: Important Questions and Preparation Tips – Area under Curve

    Question 3:

    WBJEE Three Dimensional Geometry Q3

    Solution 3:

    When the line lies on the plane then, the direction ratios of the line must be perpendicular to the direction ratios of normal to the plane.

    The line must be perpendicular to the normal to plane.

    3.1 + (2 + λ) (─2) + (─1).0 = 0

    WBJEE Three Dimensional Geometry S3

    Hence, the correct option is (C).

    WBJEE: Important Questions and Preparation Tips – Application of Derivatives

    Question 4:

    WBJEE Three Dimensional Geometry Q4

    Solution 4:

    WBJEE Three Dimensional Geometry S4

    Hence, the correct option is (b).

    JEE Main 2017 - 2018 Solved Practice Paper Set-II

    First attempt for JEE Main? Must read this article to crack the exam

    DISCLAIMER: JPL and its affiliates shall have no liability for any views, thoughts and comments expressed on this article.

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