Asap can someone with this problems just i only need which formula do i used i just need for 4,5 and 6 just tell me the formulas for law of cosines

Explanation:

The formula for law of cosines is:

This is written at the top of your paper.

The angle is substituted where the capital A is. The side opposite to the angle is the angle name's lowercase. The two other sides are b and c.

Substitute all the information you know, then isolate the variable that you do not know.

When your formula is rearranged to look like this:

Solve the left side and punch into your calculator:

cos⁻¹(left side) to find the angle A.

the barter