How do you find the value of $cos 300$ ?

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Answer 1 · 2016-08-04T14:41:14

$=0.5$

$cos300$
$=0.5$

Answer 2 · 2016-08-04T15:31:54

$cos(300^@)=1/2$

Imagine the unit circle:

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We know that $300^@$ is in the fourth quadrant, where cosine is positive.

$300^@$ has a reference angle of $60^@$ , since it is $60^@$ away from the $x$ -axis.

Since $cos(60^@)=1/2$ , we know that $cos(300^@)=1/2$ as well since $cos(theta)>0$ in the fourth quadrant.

How do you find the value of cos 300cos 300?