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OpenStudy (anonymous):
what is equivalent to (sin x + 1)(sin x − 1)?
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OpenStudy (anonymous):
(sin(x) + 1)(sin(x) - 1) = sin^2(x) - 1 sin^2(x) + cos^2(x) = 1 sin^2(x) - 1 + cos^2(x) = 0 Therefore: sin^2(x) - 1 = -cos^2(x)
OpenStudy (anonymous):
-cos2x?
OpenStudy (anonymous):
THANK YOU!!!
OpenStudy (raden):
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