Simplify cos(( square root of 2)/2)
Problem
Solution
Identify the expression as the cosine of a constant value, where the argument is
√(,2)/2 radians.Recognize that
√(,2)/2 is approximately0.7071 radians.Evaluate the cosine function for this numerical value. Since
√(,2)/2 is not a standard multiple ofπ (likeπ/4 , the expression is already in its simplest exact form.Note the distinction that if the task were to find the angle whose cosine is
√(,2)/2 the answer would beπ/4 but here we are taking the cosine of the value√(,2)/2
Final Answer
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