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math

posted by on .

Evaluate.
1. sin^-1(-1/2)
2. cos^-1[(-root 3)/2]
3. arctan[(root3)/3]
4. cos(arccos2/3)
5. arcsin(sin 2pi)
6. sin(arccos 1)

I got these values as my answers:
1. -pi/6
2. 5pi/6
3. pi/6
4. 2/3
5. 2pi
6. 0

Can someone please tell me if they are right? thank you

  • math - ,

    The answers for inverse trigonometric depends on the range. Most of the time,
    function range
    asin(x) -π/2 to π/2
    acos(x) 0 π
    atan(x) -&pi/2 to π/2

    Based on the above ranges, here are your answers:

    1. -pi/6 correct
    2. 5pi/6 correct
    3. pi/6 correct
    4. 2/3 correct
    5. (2pi) 0
    6. 0 correct

  • math - ,

    Thank you MathMate.

  • math :) - ,

    You're very welcome!

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