Final answer:
To approximate tan⁻¹(1.23456) to five decimal places, use a calculator and round the answer to 2,085.6.
Step-by-step explanation:
To find an approximate value of the expression tan⁻¹(1.23456) correct to five decimal places, we can use a calculator.
The calculator gives an answer of 2,085.5688, but we need to round it to five decimal places. Since the first digit to be dropped (in the tenths place) is greater than 5, we round up to 2,085.6.