Question

Do number one please and make sure to show your work thank you

Answer 1

24.9

Explanation:

Law of cosines is :
`a^2 = b^2 + c^2 - 2bc(cos(A))`

Plug in 23 and 15 for b and c, and 23 for A

`a^2 = 23^2 +15^2 - 2(23*15)(cos(23))`

Simplify

`a^2 = 254 -690cos(23)`

Simplify

`a= √(254 -690cos(23)\)`

Solve

approx . 24.9