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

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

If sin(theta+phi)=n sin(theta-phi), then the value of (tan theta)/(tan phi) is equal to

If tan((theta)/(2))=5/2and tan((phi)/(2))=3/4, the value of cos(theta+phi), is

If tan theta=1/2 and tan phi=1/3, then tan(2 theta+phi)