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OJEE Permutations and Combinations — practice questions — page 5

Explore 121 free Permutations and Combinations questions in OJEE Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Permutations and Combinations questions and exercises with answers

Showing questions 121–121 of 121.

True or false: reading the identitiesRead the answer and worked solution →

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True or false: reading the identities

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Questions
  1. Statement is true
    Yes
    Statement
    The Pythagorean identity lets you find cos from sin.
  2. Statement is true
    Yes
    Statement
    The sum formulae let you expand cos(x + y).
  3. Statement is true
    Yes
    Statement
    Periodicity means adding 2π leaves the value unchanged.
  4. Statement is true
    No
    Statement
    Every trigonometric identity holds only for acute angles.
  5. Statement is true
    Yes
    Statement
    Radian measure is proportional to degree measure.
How the identities are used in practice. Source: syllabus Maths, Ch 3 Trigonometric Functions.

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SequencesProbability & StatisticsBinomial TheoremSequences and SeriesGeometryLinear ProgrammingLimits and ContinuityCorrelation and Regression