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Mathematics 20 Online
OpenStudy (ny,ny):

Which trigonometric expression does not simplify to 1? (see link)

OpenStudy (ny,ny):

http://puu.sh/iumN8/7819dc2e72.png

Vocaloid (vocaloid):

well, let's try each answer one by one and see what we get, shall we?

OpenStudy (ny,ny):

ok.

Vocaloid (vocaloid):

|dw:1434685599699:dw|

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