New Enroll here to Join NaBFID Analyst Into Class on May 6

    Question

    The value of (sin 60 º cos 30 º - cos 60 º sin 30

    º)  is equal to:
    A (√3/2) Correct Answer Incorrect Answer
    B (1/2) Correct Answer Incorrect Answer
    C √3 Correct Answer Incorrect Answer
    D (2/√3) Correct Answer Incorrect Answer

    Solution

    (sin 60 º cos 30 º - cos 60 º sin 30 º) = √3/2 x √3/2 – 1/2 x 1/2 = 2/4 = 1/2 Alternate Solution sin A cos B - cos A sin B = sin (A - B) So, (sin 60 º cos 30 º - cos 60 º sin 30 º) = sin ( 60 º - 30 º) = sin 30 º = 1/2  

    Practice Next

    Relevant for Exams: