2 Answers

Riccardo Persiani · Answer 1 · 2019-01-14T04:58:21+0000

Answer:

$\cos\theta=0.6$

Explanation:

Method 1

The given diagram is the unit circle.

The terminal side of the angle
$\theta$ intersected the unit circle at
(0.6,0.8) .

On the unit circle, the cosine of the angle in standard position is the x-value of the point. That is,

$cos\theta=x$

The x-value of the given point is
0.6 .

$\therefore \cos\theta =0.6$

Method 2

See diagram in attachment.

$\cos\theta=(adjacent)/(hypotenuse)$

$\cos\theta=(0.6)/(1)$

$\cos\theta=0.6$

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