Homework Help: Pre-cal

Posted by terry on Monday, March 5, 2012 at 9:18pm.

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

Pre-cal - Steve, Tuesday, March 6, 2012 at 10:15am
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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