Question

How do i work this out i dont understand it

Answer 1

37

Explanation:

we know that:

C=?

c=17

b=26

a=14

using the law of cosine:

`a^(2) +b^(2) -2ab Cosc=c^(2)`

`14^(2) +26^(2) -2(14)(26)Cosc=17^(2) \\872-728Cosc=289\\-728Cosc=-583\\Cosc=(-583)/(-728) \\C=36.791\\C=37`