ok, i have this and know what it should simplify to, but why?(adsbygoogle = window.adsbygoogle || []).push({});

(1-sin(x))(sin(x))-(cos(x))(0-cos(x))

i know it simplifies to

1-sin(x)

but my book doesnt explain what exactly happens. could someone please shed some light and explain what exactly happens

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# Homework Help: Explain why this simplifies

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