Question

find m 12 years ago

Answer 1

Here you have the adjacent side (4) and the hypotenuse (17). The trig function that uses these is Cosine. The cosine of an angle is equal to the adjacent side divided by the hypotenuse, in this case 4/17:
\[\cos t = \frac{ 4 }{ 17 }\]
\[t=\arccos(\frac{ 4 }{ 17 })\]