Find x2 + y2, where x and y are related as: x sin3 + y cos3 = sin cos and x sin = y cos .
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Given:
let consider both the equation by
-(1)
-(2)
From equation 1 , we get
-(3)
we know that
Therefore, from equation (3), we have
from equation (2), we have
From equation (1), we get
divide by xy
Hence the value of x²+y² is 1
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