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glogaming16
31.12.2019 •
Mathematics
Which expression is equivalent to
(sin x + 1)(sin x − 1)?
a.)cos^2x
c.)cos^2x+ 1
d.)cos^2x − 1
+ 1
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Ответ:
sin^2x + cos^2x =1
hence Sin^2x-1 = - cos^2x
Ответ: