Question: Use a sum-to-product identity to rewrite the expression. sin 7a - sin 9 sin 7a - sin 90 = Use a sum-to-product identity to rewrite

Use a sum-to-product identity to rewrite the expression. sin 7a- sin 9a

sin 7a- sin

Use a sum-to-product identity to rewrite the expression. sin 7a - sin 9 sin 7a - sin 90 =

Use a sum-to-product identity to rewrite the expression. sin 7a- sin 9a sin 7a- sin

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