Solve the equation 2cos(3x) -1 = 0 for values in the interval 0=< x =< pi | eNotes
We have to solve the equation 2cos(3x) -1 for values in the interval 0=< x =< pi. Now we see that 2cos(3x) -1 is not an equation, let's equate it to zero. 2cos(3x) -1 = 0 => 2 cos 3x -1 = 0 => 2 cos 3x = 1 => cos 3x = 1/2 in the given t=interval we see th...