Evaluate cos(4/5)

Problem

cos(4/5)

Solution

1. Identify the expression as the cosine of a constant value given in radians.

2. Convert the fraction to a decimal to prepare for evaluation.

4/5=0.8

3. Calculate the cosine of 0.8 radians using a calculator or Taylor series approximation.

cos(0.8)≈0.6967067

4. Round the result to a standard number of decimal places, typically four.

cos(0.8)≈0.6967

Final Answer

cos(4/5)≈0.6967

Want more problems? Check here!