Find the Value Using the Unit Circle cos(40)
Problem
Solution
Identify the angle and the required trigonometric function. The task is to find the value of
cos(40) Determine if the angle is a standard value on the unit circle. The standard angles are typically multiples of
30 or45 (e.g.,0,30,45,60,90 .Recognize that
40 is not a standard angle on the unit circle. Therefore, its exact value cannot be expressed using simple radicals like1/2 or√(,3)/2 Approximate the value using a calculator or trigonometric tables if a decimal value is required.
Final Answer
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