question_answer

What is the effect on the magnitude of the resultant of two vectors when the angle \[\theta \] between them is increased from \[\mathbf{0}{}^\circ \] to\[\mathbf{180}{}^\circ \]?

Answer:

                As the angle \[\theta \] increases from \[0{}^\circ \] to\[\text{18}0{}^\circ \], the value of \[\cos \theta \] decreases, so the magnitude R of the resultant also decreases.