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Discussion :: Trigonometry

  1.  By expressing cos 113° in terms of trigonometrical ratios, answer will be

    2. A.

    − cos 62° = -0.8520
    B.

    − cos 65° = -0.4258
    C.

    − cos 67° = -0.3907
    D.

    − cos 76° = -0.7093

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    Answer : Option C

    Explanation :

    − cos 67° = -0.3907

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