SOLUTION: I have a quick question! If SinX= Square root of 2 over 3, than cos2X= what in fraction form?

SOLUTION: I have a quick question! If SinX= Square root of 2 over 3, than cos2X= what in fraction form?

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Question 600725: I have a quick question! If SinX= Square root of 2 over 3, than cos2X= what in fraction form?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!

or

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Make sure you remove all ambiguities from your question. In either case, apply an identity:

or

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