a) sin A = sin C cos C + cos B sin C
b) cos A = sin B sin C - cos B sin C
c) tan A = (tan B + tan C) / (tan B tan C -1)
Been stuck on this problem for a few hours. So far i've tried it on a diagram, labeling opposite sides as a, b, and c. Then I plugged in the variables for the equations. This was part of the section that uses sum-difference formulas.
b) cos A = sin B sin C - cos B sin C
c) tan A = (tan B + tan C) / (tan B tan C -1)
Been stuck on this problem for a few hours. So far i've tried it on a diagram, labeling opposite sides as a, b, and c. Then I plugged in the variables for the equations. This was part of the section that uses sum-difference formulas.