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How do i answer this question?

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i need to answer sin^-1(sin 2/3pi)

wthout a calc..is that possible?

help plz?

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  1. The inverse function "undoes" its companion function.

    antisine(sin(x)) = x


  2. sin^-1 means arcsin or inverse sine which in this problem cancels the sin......

    So all you are left with is 2/3pi your answer

    sin^-1(sin 2/3pi)= 2/3pi
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