1). Am I seated comfortably, with plenty of light on my paper ?
2). Is my pencil sharp ?
4 times 3.14 times 8 squared
803.8
The question is related to trigonometry and we have to use the formula of double angle .
Here we use double angle formula of tangent function which is

Given expression is

Comparing it with double angle formula, we will get x = 5
SO the required expression is equal to


So the answer is tan(10) .
Besides just using the math in everyday life, it is also used in newspapers.
Answer:
$36.80
Step-by-step explanation:
15% of 32 = 0.15x32 = $4.80
32+4.80 because it was a tip being added to the bill
=36.80