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If `sin alpha + sin beta =2`, then find the value of `cos^(2)alpha+cos^(2)beta` .

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If `sin alpha + sin beta =2`, then find the value of `cos^(2)alpha+cos^(2)beta` .
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Given , ` sin alpha + sin beta=2`
`alpha=beta=90^(@)`.
`:. Cos^(2) alpha+cos^(2)beta= cos^(2)90^(@)+cos^(2)90^(@)=0`.
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