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arcsin(arccos(arctan(tan(cos(sin( 9 ))))) - 9 on DM42 : r/calculators
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How do you evaluate using a calculator of cos^-1(-0.8090)? | Socratic
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
