
Concept explainers
Find each value rounded to four significant digits:
tan143°

To calculate: The value of tan143° to the four decimal places.
Answer to Problem 1R
Solution:
The value of tan143° is −0.7536.
Explanation of Solution
Given Information:
The provided trigonometric ratio is tan143°.
Calculation:
Consider the provided trigonometric ratio,
tan143°
Use a Ti-83 calculator to find the value of tan143° rounding to four significant digits.
Step 1: Press ‘ON’ key.
Step 2: Press ‘MODE’ key and set the mode to a degree.
Step3: Press ‘TAN’ key, enter the value 143 and press enter to obtain the value of tan143°.
The value obtained as,
tan143°=−0.7535
Therefore, the value of tan143° is −0.7536.
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