Question

if the angle between equal vectors of magnitude p is theta equal to 60

Answer 1

Answer:

Vectors P and Q have equal magnitude P and angle between them is Ф.

Magnitude of vector P - Q = SqRoot[ P² + P² - 2 P P Cos Ф ]

= √2 P SqRoot[ 1 - Cos Ф ] = √2 P SqRoot[ 2 Sin² Ф/2 ] = 2 P SinФ/2