Using the Product to Sum Formula for Trig, Calculate Cos(45°)Cos(30°)

Cos(u)Cos(v) = | Cos(u - v) + Cos(u + v) |

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In this case, u = 45 and v = 30

Cos(45)Cos(30) = | Cos(45 - 30) + Cos(45 + 30) |

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Cos(45)Cos(30) = | Cos(15) + Cos(75) |

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Cos(45)Cos(30) = | 0.49 + 0.3 |

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Cos(45)Cos(30) = | 8 |

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Cos(45)Cos(30) =