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The value of cos 30° is the same as which of the following?

The value of cos 30° is the same as which of the following?
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The value of cos 30° is the same as which of the following?

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User Mark Hillick
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cos 30 can be written as 1/2. If you are not sure, you can use subtraction formula: sin(A-B) = sinAcosB - cosAsinB
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User Pschichtel
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