Find the Exact Value cos(-1.9967)

Problem

cos(−1.9967)

Solution

1. Identify the input value as an angle in radians.

2. Apply the even-odd identity for the cosine function, which states that cos(−θ)=cos(θ)

3. Substitute the value into the identity to simplify the expression.

4. Calculate the numerical value using a calculator, as −1.9967 is not a standard angle.

5. Round the result to a standard number of decimal places (typically four) for the final representation.

Final Answer

cos(−1.9967)=−0.4121

Want more problems? Check here!