Use an identity to write the expression as a single trigonometric function value or as a single number.
(Type an exact answer, using radicals as needed. Do not include the degree symbol in your answer.)
Final Answer: The expression
Step 1 :Given the expression
Step 2 :We can use the Pythagorean identity in trigonometry, which states that
Step 3 :Substituting this into the given expression, we get
Step 4 :Converting the angle to radians, we get approximately 0.627 radians.
Step 5 :Calculating the cosine of this angle, we get approximately 0.810.
Step 6 :Substituting this value back into the expression, we get approximately 0.052.
Step 7 :Final Answer: The expression