Trigonometry Examples

Step 1
The cosine of an angle is equal to the ratio of the adjacent side to the hypotenuse.
Step 2
Substitute the name of each side into the definition of the cosine function.
Step 3
Set up the equation to solve for the adjacent side, in this case .
Step 4
Substitute the values of each variable into the formula for cosine.
Step 5
Multiply by .
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