Final answer:
To find the value of cos(1.1), use a calculator in radian mode and round the result to five decimal places.
Step-by-step explanation:
The value of the trigonometric function cos(1.1) radians cannot be determined exactly as it is not a special angle for which we know an exact trigonometric value. To find the value of cos(1.1), you will need to use a calculator. When you enter cos(1.1) into a scientific calculator, you should set the calculator to radian mode since 1.1 is in radians. The calculator will give you an approximate value, which you should round to five decimal places as per the instruction.
For example, if the calculator shows a value of 0.45399049974 for cos(1.1), you would round this to 0.45399, which is the approximate value of cos(1.1) to five decimal places.