Explanation:
The total resistance used to calculate the total resistance of the two parallel resistor is given by :

Taking reciprocal of the above equation.

We can also write the above equation as :

On simplification of above equation,

or

Hence, proved.
<span>covalent bond I think </span>
It travels 75 Sin 45 Km Km East and the same distance 75 Cos 45 Km North.