# Trigonometry Examples

Step 1

Find the value using the definition of cosine.

Step 2

Substitute the values into the definition.

Step 3

Divide by .

Step 4

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Step 5

Step 1

Find the value using the definition of cosine.

Step 2

Substitute the values into the definition.

Step 3

Divide by .

Step 4

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Step 5

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