2 sin2 -4 cos- sin - sin -cos 2-

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Product of Trigonometric Ratios in Terms of Their Sum

2 sin2 β+4 co...

Question

$2 s i n^{2} β + 4 c o s (α + β) s i n α s i n β + c o s 2 (α + β) =$

s i n 2 α

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c o s 2 β

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c o s 2 α

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s i n 2 β

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