sin x = 1 ???
x = pi/2
x = pi/2 + 2 pi
x = pi/2 + 4 pi No - delete, out of range
refer to the graph of y=sin(x) or cos(x) to find the exact values of (x) in the interval [0,4pi]that satisfy the equation.
4sin(x)=4
3 answers
y=2 cos x interval of -π, 4π
graph of y= 2 cos x on the interval -π, 4π