Find the cosine and sine of 180°. round your answers to the nearest hundredth if necessary.

Solution:

We have to find the cosine and sine of 180°.

We know that, in the unit circle the coordinates of the point belong to the x-axis for an angle equal to 180° is (-1, 0).

So, x = 1 unit y = 0 units.

Applying Pythagoras theorem,

h = √(1² + 0²)

h = 1

Now, cos 180° = x/h

= 1/1

cos 180° = 1

sin 180° = y/h

= 0/1

sin 180° = 0

Therefore, cosine 180° is 1 and sine 180° is 0.

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Find the cosine and sine of 180°. round your answers to the nearest hundredth if necessary.

Summary:

The cosine and sine of 180° round to the nearest hundredth is 1 and 0.