Question 950272
Solve the equation for t on the interval [0,2π) 
4 cos t - 4 sin t = 4
cos t-sin t=1
cos t-1=sin t
cos^2(t)-2cos t+1=sin^2(t)
cos^2(t)-2cos t+1=1-cos^2(t)
2cos^2(t)-2cos t=0
cos^2(t)-cos t=0
cos t(cos t-1)=0
cos t=0
t=π/2, 3π/2
or
cos t-1=0
cos t=1
t=0