precioussmith76
07.07.2019 •
Mathematics
Simplify (1 − cos x)(1 + cos x). (2 points)
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Ответ:
sin²x
Step-by-step explanation:
we have
(1 − cos x)(1 + cos x)=1-cos²x
Remember that
sin²x+cos²x=1 > i-cos²x=sin²x
therefore
(1 − cos x)(1 + cos x)=sin²x
Ответ:
9
Step-by-step explanation: