Question

In triangle ABC, a = 3, b = 5, and c = 7. Find the approximate value of angle A

Answer 1

@triciaal can you help me please

Answer 2

sketch the triangle in the "draw" and label

Answer 3

i got 142 is that right?
btw there is no drawing that comes with it :( @triciaal

Answer 4

the largest angle is always opposite the longest side.
use the cosine rule to find the largest angle
c^2 = a^2 + b^2 - 2ab Cos C
then we can use the sin rule to find the other angles

Answer 5

I don't know I have been typing out the process so we can do it

Answer 6

oh sorry. /:

Answer 7

use the "draw" below

Answer 8

labels?
then use the cosine formula