Prove that: 2cos,A A= tan A.The diameters of the lower and upper ends of a bucket in the from of a frustum of a cone are 10 cm and 30 cmrespectively. If its height is 24 cm, find :- cosThe area of the metal sheet used to make the bucket.(i)(i) Why we should avoid the bucket made by ordinary plastic? IUse -314em the top of a 100 m high light house from the sea-level, the angles of depression of two ships areide of the light house, find the distance between

Prove that: 2cos,A A= tan A.The diameters of the lower and upper ends

1.	Prove that: 2cos,A A= tan A.The diameters of the lower and upper ends of a bucket in the from of a frustum of a cone are 10 cm and 30 cmrespectively. If its height is 24 cm, find :- cosThe area of the metal sheet used to make the bucket.(i)(i) Why we should avoid the bucket made by ordinary plastic? IUse -314em the top of a 100 m high light house from the sea-level, the angles of depression of two ships areide of the light house, find the distance between
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