From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	There is no angle <math>v</math> which gives <math>\cos v = 2</math>, because the value of cosine is always between <math>-1</math> and <math>1\,</math>.
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There is no angle \displaystyle v which gives \displaystyle \cos v = 2, because the value of cosine is always between \displaystyle -1 and \displaystyle 1\,.