If `u_1` and `u_2` are the units selected in two systems of measurement and `n_1` and `n_2` their numerical values, then

If u_(1) and u_(2) are the selected in two system of measurement and n_(1) and n_(2) their nomerical values, then

The same physical quantity is expressed in two different units x_(1) and x_(2) . The corresponding numerical values of the quantity are n_(1) and n_(2) respectively. Then

A physical quantity is measured and the result is expressed as nu where u is the unit and n is the numerical value. If the result is expressed in various unit then

The numerical values and units of a physical quantity in two different system of units are n_(1), n_(2) and u_(1), u_(2) respectively. Then

The numerical values and units of a physical quantity in two different system of units are n_(1), n_(2) and u_(1), u_(2) respectively. Then

If u_n = 2cos n theta then u_1u_n - u_(n-1) is equal to

If U_n=2 cosntheta then U_1U_n-U_(n-1) is equal to