Let fz cosz on 0 2T solve fz 2 Preview Preview Points possib

Let f(z) cos(z), on [0, 2T), solve f(z) 2 Preview Preview Points possible: 1 This is attempt 1 of 3. Submit c 2016 XYZ Homework Privacy Policy IADA compliance PDEIContactu xyzHomework is powered by MathAs o 2006-2016 by David Lippman

Solution

f(x)= cos x, f(x)= sqrt2/2

cosx =sqrt2/2

taking cos^-1 both sides

cos^-1(cos x)= cos-1(sqrt2/2)

x=45degree, 315 degree