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Was doing cosine law with an sss triangle. I keep getting error on my ti-84 but it works fine on an online calculator. What is causing this? Thanks. : r/trigonometry
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![Trigonometry Calculator (Sin, Cos, Tan) - [100% Free] - Calculators.io](https://calculators.io/wp-content/uploads/2018/05/Trigonometry-Calculator-Sin-Cos-Tan.png "Trigonometry Calculator (Sin, Cos, Tan) - [100% Free] - Calculators.io")
Trigonometry Calculator (Sin, Cos, Tan) - [100% Free] - Calculators.io
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