Use the Parallelogram Rule to Find the Magnitude of the Resultant

Use the parallelogram rule to find the magnitude of the resultant force for the two forces shown in the figure. Round to
one decimal place.
-The equation $\sin 2 x - \cos 3 x = - 4$ has no solution in the interval $[ 0,2 \pi )$ . Explain what this tells you about the graph of $y = \sin 2 x - \cos 3 x + 4$ .