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Math Help - Please help me on my Homework.

  1. #1
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    Please help me on my Homework.

    I can't figure this question, please help me.

    arcsin(sin(-3pi/5))
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  2. #2
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    Re: Please help me on my Homework.

    Hey TrimHonduras.

    Hint: What possible values can arcsin have? Also what sin(-x) in terms of sin(x) and what is sin(pi+x) in terms of sin(x)?
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  3. #3
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    Re: Please help me on my Homework.

    ans:
    -1.25663706 rad


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  4. #4
    Forum Admin topsquark's Avatar
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    Re: Please help me on my Homework.

    Please don't just give out answers to homework problems. This is against MHF policy and will not be tolerated.

    -Dan
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  5. #5
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    Re: Please help me on my Homework.

    Quote Originally Posted by bluffy View Post
    ans:
    -1.25663706 rad
    I can't help but think this was intended as a joke. Either that or "bluffy" has no clue what the problem is and is just "bluffing"!
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  6. #6
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    Re: Please help me on my Homework.

    For starters, SURELY you know that sine and arcsine are inverse functions, and so cancel each other out...
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  7. #7
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    Re: Please help me on my Homework.

    So far I got I got that the -3pi/5 falls on QIII, and that my reference angle (theta hat)= 2pi/5. So the answers is -2pi/5.... is this right!
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