Find the Exact Value cos(-3/5)

Problem

cos(−3/5)

Solution

1. Identify the property of the cosine function. The cosine function is an even function, which means cos(−x)=cos(x) for any value x

2. Apply the even function property to the given expression.

cos(−3/5)=cos(3/5)

3. Determine if further simplification is possible. Since 3/5 is in radians and is not a standard angle (like π/6 or π/4, the exact value is expressed as the function of that value.

Final Answer

cos(−3/5)=cos(3/5)

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