if cos-1x + cos-1y + cos-1z = pi
prove that x2 + y2 + z2 +2xyz = 1
the given equation is :
...........(1)
since where
therefore
i.e
squaring on both sides:
hope this helps you.
cheers!!
if cos-1x + cos-1y + cos-1z = pi
prove that x2 + y2 + z2 +2xyz = 1
the given equation is :
...........(1)
since where
therefore
i.e
squaring on both sides:
hope this helps you.
cheers!!