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OpenStudy (anonymous):
Which expression is equivalent to (sin x + 1)(sin x − 1)?
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OpenStudy (anonymous):
cos2x -cos2x cos2x + 1 cos2x − 1 -cos2x + 1
Nnesha (nnesha):
foil!!
Nnesha (nnesha):
|dw:1434123061043:dw| multiply
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