Find the Exact Value cos(15/17)

Problem

cos(15/17)

Solution

1. Identify the expression as the cosine of a constant value given in radians.

2. Determine if the value 15/17 corresponds to a standard angle on the unit circle (such as 0 π/6 π/4 π/3 or π/2.

3. Conclude that since 15/17 is not a standard angle and no further trigonometric identities or inverse functions are provided, the exact value is represented by the expression itself.

Final Answer

cos(15/17)=cos(15/17)

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