Discover Questions

What are the four main weathering agents on earth? Missing options chain data? Cos π/18 + cos 3π/18 + cos 5π/18 + cos 7π/18 = 3/16
how we prove it? Which is greater far more or much more? Two forces of 10 newton each are applied on a string from opposite sides.How much would be the tension in the string?
some reasoning please?