Question

Can you help me with number 14? Thank you I am having trouble with it.

Answer 1

To solve number 14, we will make use of the Law of Cosines, which states that:

`=\sqrt[]{^2+^2^{}-2\cos}`

As in our problem b = 15, c = 13 and A = 95°,we can replace these values in the formula and solve for a:

`=\sqrt[]{15^2+13^2-2\cdot(15\cdot13)\cos 95}`
`=\sqrt[]{15^2+13^2-390\cos 95}`
`a\approx20.69`

In our case, a is the segment BC.

Answer: 20.7