Simplify cos(3)

Problem

cos(3)

Solution

1. Identify the expression as the cosine of the real number 3.

2. Determine if the input is in degrees or radians. Since there is no degree symbol, the input is 3 radians.

3. Evaluate the expression. The value 3 is not a standard angle (like π or π/2, so the expression cos(3) is already in its simplest exact form.

4. Approximate the value if needed. Using a calculator, cos(3)≈−0.98999 However, in exact mathematical terms, the expression cannot be simplified further.

Final Answer

cos(3)=cos(3)

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