Question 248734
Use the Law of Cosines to find the indicated value. Roud your answer to the nearest hundredth. I am stuck on this part of Algebra are my answers right. This so confusing please help

1). Find the third side of a triangle with sides of 35ft and 26ft and an included angle of 16. Answer cos = 12.31
{{{c^2 = a^2 + b^2 - 2abcos(16)}}}
{{{c^2 = 1225 + 676 - 2*35*26*0.9612617}}}
{{{c^2 = 151.5037}}}
c =~ 12.31
---------------
2). Find the third side of a triangle with sides of 19m and 16m an and included angle of 43. Answer cos =0.555113302
Same as above, c =~ 13.1277
I don't know what you mean by cos = 0.555...
----------------------------
3). Find the third side of a triangle with sides of 120cm and 100cm and an included angle of 47. Answer 156.207
I get 89.62 ???
--------------