To ease the understanding, let's write it in degrees and not in Radian:
Formula of conversion: Degree°/180 = Radian/π
Convert 7π/4 in degrees: = (7x180)/4 = 315°
This angle is in the IV th Quadrant of the UNIT circle. So you can write 315° or - 45° .
sin(7π/4) = sin(315°) = sin( - 45°) = - sin(45°) = - (√2)/2
1) if they had the same niche they either live in different areas of the niche due to adaptation or one of them will die due to competition with the other animal.
2) they might need to move to a different habitat due to lack of resources and the competition was better adapted to the circumstances.
hope this helps
(4^2+8^2)^.5 = 8.944
It's not 12.
So 4,8,12 can't be the side lengths of a right triangle.
4w-7k=28
-4w -4w
-7k=-4w + 28
/-7 /-7
k=0.57 + 4