Question

Evaluate cos 300' without using a calculator,

2
O A. 1 /
O B. 1
о
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Answer 1

`Cos \ 300 = (1)/(2)`

Explanation:

`\sf \boxed{Cos \ (2\pi - \theta) = Cos \ \theta}`

Cos 300 = Cos ( 360 - 60)

= Cos 60

`\sf = (1)/(2)`