Question

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


22*

38*

142*

158*

Answer 1

@ganeshie8

Answer 2

again use the law of cosines

Answer 3

\(a^2=c^2+b^2-2cb ~\cos A\)

Answer 4

22*

Answer 5

thnx:)

Answer 6

np :)