the cosine function is an even function.\na. true\nb. false
the cosine function is an even function.\na. true\nb. false
Answer
Brief Explanations:
An even function satisfies the property $f(-x)=f(x)$. For the cosine - function, $\cos(-x)=\cos(x)$ for all real - valued $x$. This is a well - known property of the cosine function in trigonometry.
Answer:
A. True