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OpenStudy (anonymous):
need someone to explained, how can i proof sin^(-1) x +cos^(-1) x = pi/2 using triangle.
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OpenStudy (anonymous):
do u want to learn proof ?
OpenStudy (anonymous):
yeah
OpenStudy (anonymous):
ok
OpenStudy (loser66):
ok, I redo
OpenStudy (loser66):
|dw:1450835243483:dw|
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