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How do you find inverse cosine on a TI-84? - Answers

I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key. This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.



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How do you find inverse cosine on a TI-84? - Answers

https://math.answers.com/math-and-arithmetic/How_do_you_find_inverse_cosine_on_a_TI-84

I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key. This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.



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https://math.answers.com/math-and-arithmetic/How_do_you_find_inverse_cosine_on_a_TI-84

How do you find inverse cosine on a TI-84? - Answers

I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key. This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.

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      I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key. This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.

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