Simplify cos(47)

Problem

cos(47)

Solution

1. Identify the expression as the cosine of an angle measured in degrees.

2. Determine if the angle is a standard reference angle (such as 0 30 45 60 or 90.

3. Conclude that since 47 is not a standard angle and cannot be easily expressed using sum, difference, or half-angle identities of standard angles, the expression is already in its simplest exact trigonometric form.

Final Answer

cos(47)=cos(47)

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