Arcsin x Watch

mystreet091234
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Can we think of angle y in quadrant II? As its in interval [0, pi]Name:  image.jpg
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HapaxOromenon
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(Original post by mystreet091234)
Can we think of angle y in quadrant II? As its in interval [0, pi]Name:  image.jpg
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Yes.
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mystreet091234
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(Original post by HapaxOromenon)
Yes.
Thanks for replying

But how?
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HapaxOromenon
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(Original post by mystreet091234)
Thanks for replying

But how?
Actually scrap that and just do this:
Let arccos x = y.
Then x = cos y = sin(π/2 - y) (you can verify this by the subtraction formula for cos)
and so arcsin x = π/2 - y by taking arcsin of both sides.
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