apply-the-most-suitable-technique-to-determine-the-solution-of-the-following-equ-2

Question

Apply the most suitable technique to determine the solution of the following equation within the interval [0, 2π), employing exact values whenever feasible or providing approximations accurate to four significant figures.
2 cos A - 19 = 5 cos A + 11

2 cos A - 19 = 5 cos A + 11

Accepted Answer

No solution

Answer

x = {0, π, 2π}

Answer

x = {π/4, 7π/4}

Answer

x = {π/12, 5π/12}