Question: Pg. 416 # 75-81 odd, 105- 107 Use the sum-to-product formulas to write the sumacor difference as a product. 75 % sin 50 - sin

Pg. 416 # 75-81 odd, 105- 107 Use the sum-to-product formulas to write the sumacor difference as a product. 75 % sin 50 - sin 30 7 78 Cos 6 X + Cos2 x 2 cos (58+30 ) 51/50- 30 Zcos (6*+2x) 2 ) cos ( 6-2 ) 2 cos 40 . sine 2 cos 4 X . COS 2 X 2 . 40 ' D = SIn80 COS16X 79: sin(at B) - sin(a-B) 818 coslet ()- cos ( 6 - # ) Verify the identity: 105. SAX + SHTY = cott CosX - cosy xty 106. sixtyiny- - cot 105. sing + sing , tan cosX - cosy cos* + cosy 107. cos 4 x tCos 2x = cot 3X sin yx + sin 2 x

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