For the following equation solve for a all solutions answer

For the following equation, solve for (a). all solutions (answer in radians) and (b) x if 0 lessthanorequalto x

a) tanx(tanx +1) =0

tanx =0

x = kpi

tanx = -1 ; x = pi -pi/4 +k*pi

x = 3pi/4 + k*pi

Solution x = k*pi , 3pi/4 +k*pi

b) Interval : 0<=x <pi

x = 0 , pi , 3pi/4 , 7pi/4