The sketch of the question is given below:
The distance between the Earth and Sun in the image above is represented by b
To get b, we will use the relation below:
![\tan x^0=(y)/(b)](https://img.qammunity.org/2023/formulas/mathematics/college/1np1e0b3hkvz3x12odzx0ye1spvx673ga3.png)
To get b, we will cross multiply
![b=(y)/(\tan x^0)=y*(1)/(\tan x^0)=y*\cot x^0](https://img.qammunity.org/2023/formulas/mathematics/college/6np2b1zm097gn85hy3q0c97n03f5knimng.png)
Hence,
b=y cotx°
Therefore, the trig function would the scientists use to calculate the distance between the Earth and the Sun is:
![y\cot x^0](https://img.qammunity.org/2023/formulas/mathematics/college/h1m8u8e33clvjbifxncnl4n5xlmppmrygz.png)