Pre-cal

Find the length of side b to the nearest whole number if side a =
105, angle A = 65 degrees, and angle B = 37 degree.

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asked by terry
  1. since the angles add to 180°, C=78°

    using the law of cosines,

    b/sinB = a/sinA

    b/sin37° = 105/sin78°
    b = .6018 * 105/.9781
    b = 64.60 = 65

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    posted by Steve

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