Question

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Determine an exact value for the expression and include a complete solution
(sin 225°) ² – cos 330° cos 240°

Answers

  1. Answer:
    1.187991
    Step-by-step explanation:
    sin^2(225)−(cos(330))(cos(240))
    =(−0.930095)2−(cos(330))(cos(240))
    =0.865076−(cos(330))(cos(240))
    =0.865076−−0.991199(cos(240))
    =0.865076−(−0.991199)(0.325781)
    =0.865076−(−0.322914)
    =1.187991

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