SOLUTION: if x is in quadrant 4 and cos x = square root of 7/ 3 then what is sin x?

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Question 864436: if x is in quadrant 4 and cos x = square root of 7/ 3 then what is sin x?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if x is in quadrant 4 and cos t = square root of 7/ 3 then what is sin t?
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In QIV, x is positive and y is negative.
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Since cos = x/r, x = sqrt(7) and r = 3
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Then y = -sqrt[3^2-(sqrt(7))^2] = -sqrt(2)
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Ans: sin(t) = y/r = -sqrt(2)/3
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Cheers,
Stan H.
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