I guess you have a right triangle with legs 6 and 8 in length. The hypotenuse has length=√(6²+8²)=√100=10.
We don’t know which angle because there’s no picture. But we can take one of the angles and find its trig functions. Call the angle θ.
sinθ=6/10=⅗, cosθ=8/10=⅘, tanθ=6/8=¾;
cosecθ=5/3=1⅔, secθ=5/4=1¼, cotθ=4/3=1⅓.
If θ is the other angle:
cosθ=6/10=⅗, sinθ=8/10=⅘, cotθ=6/8=¾;
secθ=5/3=1⅔, cosecθ=5/4=1¼, tanθ=4/3=1⅓.