Combined Defence Services - Officer's Training Academy (CDS OTA)

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Combined Defence Services - Officer's Training Academy (CDS OTA)

The Officers Training Academy is a training establishment of the Indian Army that trains officers for the Short Service Commission. The 49-week course at the OTA prepares graduates for all branches of the Army, except for the Army Medical Corps.

What's Included
  • Mobile support
  • Lesson archive
  • Anytime access
Features
  • ENGLISH
  • GENERAL KNOWLEDGE
Requirements

None

Lessons

  • 6 Sections
  • English

    Description

    • Spotting of Errors
    • Antonyms
    • Synonyms
    • Vocabulary (Idioms & Phrases)
    • Sentence Improvement
    • Sentence Completion (Fill in the blanks & Cloze Test)
    • Ordering of Words & Sentences
    • Comprehension
    • Active – Passive Voice
    • Direct – Indirect Speech or Reported Speech
    • One Word Substitution
    • Parts of Speech
    • Spelling
    • Transformation
  • GENERAL KNOWLEDGE

    Description

    • Physics
    • Chemistry
    • Biology
    • Indian Polity
    • History
    • Geography
    • Economics
    • Defence Specific
    • Current Affairs & Static GK
  • ELEMENTARY ARITHMETIC

    Description

    ARITHMETIC

    Number System—Natural numbers, Integers, Rational and Real numbers.

    Fundamental operations, addition, subtraction, multiplication, division, Square

    roots, Decimal fractions. Unitary method, time and distance, time and work,

    percentages, applications to simple and compound interest, profit and loss, ratio and

    proportion, variation.

    Elementary Number Theory—Division algorithm. Prime and composite numbers.

    Tests of divisibility by 2, 3, 4, 5, 9 and 11. Multiples and factors. Factorization

    Theorem. H.C.F. and L.C.M. Euclidean algorithm. Logarithms to base 10, laws of

    logarithms, use of logarithmic tables.

    ALGEBRA

    Basic Operations, simple factors, Remainder Theorem, H.C.F., L.C.M., Theory of

    polynomials, solutions of quadratic equations, relation between its roots and

    coefficients (Only real roots to be considered). Simultaneous linear equations in two

    unknowns—analytical and graphical solutions. Simultaneous linear inequations in

    two variables and their solutions. Practical problems leading to two simultaneous

    linear equations or inequations in two variables or quadratic equations in one 21

    variable & their solutions. Set language and set notation, Rational expressions and

    conditional identities, Laws of indices.

    TRIGONOMETRY

    Sine ×, cosine ×, Tangent × when 0° < × < 90° Values of sin ×, cos × and tan ×, for ×

    = 0°, 30°, 45°, 60° and 90°

    Simple trigonometric identities.

    Use of trigonometric tables.

    Simple cases of heights and distances.

    GEOMETRY

    Lines and angles, Plane and plane figures, Theorems on (i) Properties of angles at

    a point, (ii) Parallel lines, (iii) Sides and angles of a triangle, (iv) Congruency of

    triangles, (v) Similar triangles, (vi) Concurrence of medians and altitudes, (vii)

    Properties of angles, sides and diagonals of a parallelogram, rectangle and square,

    (viii) Circles and its properties including tangents and normals, (ix) Loci.

    MENSURATION

    Areas of squares, rectangles, parallelograms, triangle and circle. Areas of figures

    which can be split up into these figures (Field Book), Surface area and volume of

    cuboids, lateral surface and volume of right circular cones and cylinders, surface

    area and volume of spheres.

    STATISTICS

    Collection and tabulation of statistical data, Graphical representation frequency

    polygons, histograms, bar charts, pie charts etc. Measures of central tendency.

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