Cosine = adjacent / hypotenuse if cosine B = 255 / 257 then adjacent = 255 and hypotenuse = 257
sine = opposite / hypotenuse sine (A) = 255 / 257 sine (A) =
<span>
<span>
0.9922178988 </span></span>
Looking up the arc sine of <span>
<span>
<span>
0.9922178988 </span></span></span><span><span><span> </span></span></span><span><span><span /></span></span>we find that it is 82.847 Degrees Angle A = 82.847 Degrees