7. If tan`theta` = n tan`phi`, then maximum value of `tan^2 (theta-phi)` is equal to

If tan theta = n tan phi then the maximum value of tan^(2)(theta-phi) is equal to

If tantheta = ntan phi then the maximum value of tan^(2)(theta - phi) is equal to

If tantheta=3tanphi , then the maximum value of tan^2(theta-phi) is

If tan theta=3tan phi, then the maximum value of tan^(2)(theta-phi) is

If tan theta =4/5 and tan phi =5/4, then the value of (theta+phi) is-

If tan theta=1/2 and tan phi=1/3 , then the value of (theta + phi) is :

If tan theta=(1)/(2) and tan phi=(1)/(3), then the value of theta+phi is

If theta+phi=(pi)/(3) where theta and phi are positive angles, then the maximum value of tan theta tan phi is equal to