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so what you do is Soh Cah Toa, Cah for cosine so if you have a triangle you do the length of the adjacent divided by hypotenuse and the number you get (the rest depends on the calculator) you press 2nd or shift then cos button on your calculator. remember the calculator must be scientific

the actual formula is cosine theta=a

h

then you write the numbers in and you should know the rest

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Q: What is the cosine formula in trig?
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