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

    Question

    What is the value of (1 - sin A)/(1 + Sin A) given that

    tan A = 5/12 and 0° ≤ A ≤ 90°.
    A 1/3 Correct Answer Incorrect Answer
    B 4/9 Correct Answer Incorrect Answer
    C 9/16 Correct Answer Incorrect Answer
    D 5/16 Correct Answer Incorrect Answer

    Solution

    We know tan A = (opposite side)/(adjacent side) = 5/12
    Therefore by applying Pythagoras theorem hypotenuse = 13
    Sin A = 5/13
    (1-sinA)/(1+SinA) = (1-5/13)/ (1+5/13) = 8/18 = 4/9

    Practice Next

    Relevant for Exams: