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Mathematics 10 Online
OpenStudy (anonymous):

could someone help me find the exact value of the following expression? arctan -sqrt(3)/3. thanks

OpenStudy (loser66):

If you can't remember some special value, just put it in calculator.

OpenStudy (redheadangel):

given a right angle triangle cosine of an angle is adjacent/hypotenuse sine of an angle is opposite/hypotenuse tangent of an angle is opposite/adjacent

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