Question

The value of Cos(-1080°)=

Answer 1

Step-by-step explanation:

DEAR THE VALUE OF COS(-1080) IS -28.

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Answer 2

Thus, the value of cos(-1080°) is 1.

Given:

cos(-1080°).

To find:

The value.

Solution:

We know that cos(-A)=cosA.

So we can write-

cos(-1080°) =cos(1080°).

It can be written in terms of 180° as follows-

cos(1080°)

cos(180°×6+0°)

This will be equal to cos0°.

We know the value of cos0° is 1.

Thus, the value of cos(-1080°) is 1.

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