JEE Main & Advanced Mathematics Trigonometric Identities Question Bank Fundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles

  • question_answer
    .If \[\tan \theta =\frac{20}{21},\] cosq  will be [MP PET 1994]

    A) \[\pm \frac{20}{41}\]

    B) \[\pm \frac{1}{21}\]

    C) \[\pm \frac{21}{29}\]

    D) \[\pm \frac{20}{21}\]

    Correct Answer: C

    Solution :

    \[\tan \theta =\frac{20}{21}\Rightarrow \cos \theta =\pm \frac{21}{29}\].


You need to login to perform this action.
You will be redirected in 3 sec spinner