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Use a sum formula to show that cos(2u)=2sinucosu
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Mr. Jacobs budgeted $1,200 for tiles his sketch of the floor requires him to use 38 white tiles each white tile cost $12
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1. use the suitable product-to-sum formula to rewrite the following expression: sin(13x/2)sin(5x/2)
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Can someone please check my answers!
2. Find value of cos(255degrees)cos(105degrees) root3 - 2 / 4 3. cos(pi/12) - cos(5pi/12) Is
