Question

I know anwer plz say how to do this sum
if you say I will make you as brainlist​

Answer 1

Answer:

Use the cosine rule.

Step-by-step explanation:

Cosine rule is

cos A = ($b^{2} + c^{2} - a^{2}$)/2bc.

where, a, b, c are sides opposite to angles A, B, C.

similarly, you can find cos B and cos C by doing cyclic interchange.

i.e, put b in place of a, c in place of b and a in place of c.

Answer 2

Answer:

నేను లేని ఫెడెరికోను వదిలివేయండి :,-):-):-):-):-)