find the value of cos(2+1)pi/2
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cos(2n+1)π/2 is always zero when n€|
When n=1
Cos(2+1)π/2= cos3π/2 = cos270° which equals to 0.
When n=2
Cos(4+1)π/2= cos5π/2= cos450°
= Cos(360+90)°=cos90°=0
When n=-1
Cos(-2+1)/π/2 = cos(-π/2) = cos(-90°)
=Cos(90°) = 0
Hence cos(2n+1)π/2 is always zero
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Answer:
Bhangar soil is older alluvial soil. Large parts of the North Indian Plains are formed of bhangar soil.
The soil presents a terrace-like feature. Khadar soil is new or younger deposits of alluvium soil on the floodplains.
This soil is renewed every year and thus is comparatively more fertile than bhangar soil.
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