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Show that the value of sin^(2) (x + a) +...

Show that the value of `sin^(2) (x + a) + sin^(2) (x + beta) - 2 cos (alpha - beta ) sin (x + alpha) sin (x + beta)` is independent of x.

Text Solution

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The correct Answer is:
`= 1 - cos^(2) (alpha - beta) = sin^(2) (alpha - beta)`
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