an equation involving trigonometric ratios of an angle is called_______if it is true for all values of angles involved.
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In several Mahajanpad cities archaeologists have found rows of pots, or ceramic rings arranged one on top of the other. These are known as ring wells. These seem to have been used as toilets in some cases, and as drains and garbage dumps. These ring wells were usually found in individual houses.
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90 angle digryjdhbfjdfnfnf
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