Question

Find the distance between the points
(a sina ,- bcosa) and (a cosa, b Sina)​

Answer 1

Answer:

use distance formula

distance= √(x²-x¹)²+(y²-y¹)²

=√(acosa-asina)²+(bsina+bcosa)²

=√a²cos²a+a²sin²a-2a²sinacosa+b²sin²a +b²cos²a+2b²sinacosa

=√a²-2a²sinacosa +b²+2b²sinacosa

=√a²(1-2sinacosa)+b²(1+2sinacosa)

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