Mathematics

11th

grade

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Trigonometric Functions

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17 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    2 cos x cos y =

    Cos ( x+y) - cos ( x-y)

    Cos ( x+y) +cos ( x-y)

    Sin ( x+y) - sin ( x-y)

    Sin ( x+y) + sin ( x-y)

  • 2. Multiple Choice
    30 seconds
    1 pt

    - 2 sin x sin y =

    Sin ( x+y) - sin ( x-y)

    Sin ( x+y) +sin ( x-y)

    Cos ( x+y) +cos ( x-y)

    Cos ( x+y) - cos ( x-y)

  • 3. Multiple Choice
    30 seconds
    1 pt

    Cos 3x =

    4cos3x3cosx4\cos^3x-3\cos x

    4cosx3cosx4\cos^{ }x-3\cos x

    4sin3x3cosx4\sin^3x-3\cos x

    4sin3x3sinx4\sin^3x-3\sin x

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