At the Point $x=-\pi$ , the Function $c(x)=\cos 2 x+0.4 \cos 5 x$

question 58

Multiple Choice

At the point $x=-\pi$
, the function $c(x) =\cos 2 x+0.4 \cos 5 x$
has

• A)A local maximum
• B)A local minimum
• C)Neither

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