<h2>
<em>Answer:</em></h2>
<em>The </em><em>letter </em><em>I</em>
<em>hope </em><em>it</em><em> helps</em>
Big ifs, question writers. These are of course approximations.
The "co" in cosine comes from complementary angles. It means since
![42^\circ + 48 ^\circ = 90^\circ](https://tex.z-dn.net/?f=42%5E%5Ccirc%20%2B%2048%20%5E%5Ccirc%20%3D%2090%5E%5Ccirc)
![\sin 42^\circ = \cos 48^\circ](https://tex.z-dn.net/?f=%5Csin%2042%5E%5Ccirc%20%3D%20%5Ccos%2048%5E%5Ccirc)
Answer: cos 48° = 2/3
Similarly,
![20.5^\circ +69.5^\circ = 90^\circ](https://tex.z-dn.net/?f=20.5%5E%5Ccirc%20%2B69.5%5E%5Ccirc%20%3D%2090%5E%5Ccirc)
![\tan 69.5^\circ = \cot 20.5^\circ = \dfrac{1}{\tan 20.5^\circ} = \dfrac 8 3](https://tex.z-dn.net/?f=%5Ctan%2069.5%5E%5Ccirc%20%3D%20%5Ccot%2020.5%5E%5Ccirc%20%3D%20%5Cdfrac%7B1%7D%7B%5Ctan%2020.5%5E%5Ccirc%7D%20%3D%20%5Cdfrac%208%203%20)
Answer: tan 69.5° = 8/3
Answer:
2187
Step-by-step explanation: