• anonymous
Getting another Calculator Error Cosine Law Trig Here is the problem A = 103 degrees Sides are b =31 c=52 Equation $$a^2 = 31^2+52^2-2\times 31 \times 52$$ = a = 66.2589 $$\large \cos B = \frac{66.25^2 +52^2-31^2}{2\times 66.25\times52}$$ Am I right so far?? Do you get an error?
Mathematics

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