How do you find the exact value of cos 180degrees - sin 180degrees?

Question

How do you find the exact value of cos 180degrees - sin 180degrees?

1 Answer

Impact of this question

18835 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-25T16:33:03

$-1$

Explanation:

Within the unit circle, cosine provides the $x$ coordinate of a point on the surface of the circle. Sine provides the $y$ coordinate of a point on the surface of the circle.

At $180^o$ , the point on the unit circle surface is $(-1,0)$ . So this means:

$x=cos(180^o) = -1$

$y=sin(180^o) = 0$

To find the exact value of $cos(180^o) -sin(180^o)$

$-1 - 0 = -1$

Science

Math

Humanities

... and beyond

How do you find the exact value of cos 180degrees - sin 180degrees?

1 Answer

Explanation:

Related questions

Impact of this question