New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If x tan 60° + cos 45° = sec 45° then the value of

    x2 + 1 is
    A 6/7 Correct Answer Incorrect Answer
    B 7/6 Correct Answer Incorrect Answer
    C 5/6 Correct Answer Incorrect Answer
    D 6/5 Correct Answer Incorrect Answer

    Solution

    x tan 60° + cos 45° = sec 45°  x × √3 +1/√2 =√2 √3 x =√2-1/√2 x =1/√6 x2=1/6 x2+1 =1/6+1 =7/6.

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