Question
When the quantity demanded of a good change by exactly
the same percentage as price, the demand is said to be:Solution
Unitary elastic demand: The quantity demanded of a good change by exactly the same percentage as price.
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
...sin2 7 ° + sin2 8 ° + sin2 9 ° + sin2 10 ° + ……… + sin2 83 ° = ?
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