Trigonometric Functions

To solve the problem, we first analyze the given expression for : Step 1: Simplify the argument of The argument of is: For , this expression simplifies to: Step 2: Use trigonometric identities Recall that if . However, in this case, the argument of is not , so we proceed differently. Let: Step 3: Compute We need to compute: Using the identity: Thus: Step 4: Express and Using the angle addition formula: Similarly: However, this approach is complex. Instead, we use the fact that: Step 5: Verify the result For , the expression simplifies to: Final Answer: